LAS VEGAS (AP) – A total of 45 people injured in the Las Vegas massacre Oct. 1 remain hospitalized in critical condition, Sheriff Joseph Lombardo said Friday. Authorities also said the Las Vegas shooter had no visual abnormalities in his brain.
Sheriff Joseph Lombardo told reporters Friday that Stephen Paddock that an autopsy found nothing unusual during a visual inspection, but his brain was shipped to a facility to look for any minute problems.
Authorities haven’t determined why Paddock opened fire on a concert crowd, killing 58 people before shooting himself. Some believed an autopsy could shed light on any medical problems that could have contributed.
FBI Special Agent in Charge Aaron Rouse says investigators have found no signs that Paddock had ideologies or connections to any groups.
Deadly Las Vegas concert shooting
LAS VEGAS, NV - OCTOBER 01: A man in a wheelchair is taken away from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
People assist a wounded woman at the Tropicana during an active shooter situation on the Las Vegas Stirp in Las Vegas Sunday, Oct. 1, 2017. Multiple victims were being transported to hospitals after a shooting late Sunday at a music festival on the Las Vegas Strip. (Chase Stevens/Las Vegas Review-Journal via AP)
A wounded person is walked in on a wheelbarrow as Las Vegas police respond during an active shooter situation on the Las Vegas Stirp in Las Vegas Sunday, Oct. 1, 2017. Multiple victims were being transported to hospitals after a shooting late Sunday at a music festival on the Las Vegas Strip. (Chase Stevens/Las Vegas Review-Journal via AP)
Las Vegas police respond during an active shooter situation on the Las Vegas Strip near Tropicana Avenue in Las Vegas Sunday, Oct. 1, 2017. Multiple victims were being transported to hospitals after a shooting late Sunday at a music festival on the Las Vegas Strip. (Chase Stevens/Las Vegas Review-Journal via AP)
Police stand at the scene of a shooting along the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. Multiple victims were being transported to hospitals after a shooting late Sunday at a music festival on the Las Vegas Strip. (AP Photo/John Locher)
Police run to cover at the scene of a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. Multiple victims were being transported to hospitals after a shooting late Sunday at a music festival on the Las Vegas Strip. (AP Photo/John Locher)
A woman sits on a curb at the scene of a shooting outside of a music festival along the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. Multiple victims were being transported to hospitals after a shooting late Sunday at a music festival on the Las Vegas Strip. (AP Photo/John Locher)
People run from the New York New York during an active shooter situation on the Las Vegas Stirp in Las Vegas Sunday, Oct. 1, 2017. Multiple victims were being transported to hospitals after a shooting late Sunday at a music festival on the Las Vegas Strip. (Chase Stevens/Las Vegas Review-Journal via AP)
This undated photo provided by the Las Vegas Metropolitan Police Department shows Marilou Danley. Danley is being sought by the LVMPD for questioning in connection with the investigation into the active shooter incident on Sunday, Oct. 1, 2017. (Las Vegas Metropolitan Police Department via AP)
LAS VEGAS, NV - OCTOBER 01: People take cover at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: Las Vegas police stand guard along the streets outside the the Route 91 Harvest country music festival grounds after a active shooter was reported on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
Police officers advise people to take cover near the scene of a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher)
A police officer takes cover behind a police vehicle during a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher)
Medics treat the wounded as Las Vegas police respond during an active shooter situation on the Las Vegas Stirp in Las Vegas Sunday, Oct. 1, 2017. Multiple victims were being transported to hospitals after a shooting late Sunday at a music festival on the Las Vegas Strip. (Chase Stevens/Las Vegas Review-Journal via AP)
A police officer takes cover behind a truck at the scene of a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. Multiple victims were being transported to hospitals after a shooting late Sunday at a music festival on the Las Vegas Strip. (AP Photo/John Locher)
Drapes billow out of broken windows at the Mandalay Bay resort and casino Monday, Oct. 2, 2017, on the Las Vegas Strip following a deadly shooting at a music festival in Las Vegas. A gunman was found dead inside a hotel room. (AP Photo/John Locher)
Stephen Paddock in an undated image (CBS News)
One of the weapons Stephen Paddock used during the Las Vegas massacre, October 3, 2017 (CBS)
A funeral home van departs the Las Vegas Village concert grounds after a lone gunman opened fired on the Route 91 Harvest country music festival on October 2, 2017 in Las Vegas, Nevada. The gunman, identified as Stephen Paddock, 64, of Mesquite, Nevada, allegedly opened fire from a room on the 32nd floor of the Mandalay Bay Resort and Casino on the music festival, leaving at least 58 people dead and over 500 injured. According to reports, Paddock killed himself at the scene. (Photo by David Becker/Getty Images)
People are directed to rides outside the Thomas & Mack Center after a mass shooting at a country music festival on October 2, 2017 in Las Vegas, Nevada. People who could not go to hotel-casinos that were closed after the shooting are temporarily staying at the center. The gunman, identified as Stephen Paddock, 64, of Mesquite, Nevada, allegedly opened fire from the Mandalay Bay Resort and Casino on the music festival, leaving at least 50 people dead and hundreds injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by Ethan Miller/Getty Images)
People wait to get on a McCarran International Airport rental car bus outside the Thomas & Mack Center after a mass shooting at a country music festival on October 2, 2017 in Las Vegas, Nevada. People who could not go to hotel-casinos that were closed after the shooting are temporarily staying at the center. The gunman, identified as Stephen Paddock, 64, of Mesquite, Nevada, allegedly opened fire from the Mandalay Bay Resort and Casino on the music festival, leaving at least 50 people dead and hundreds injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by Ethan Miller/Getty Images)
A cowboy hat lays in the street after shots were fired near a country music festival on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)
People scramble for shelter at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)
People run from the Route 91 Harvest country music festival after apparent gun fire was hear on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)
A man lays on top of a woman as others flee the Route 91 Harvest country music festival grounds after a active shooter was reported on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 2 people dead. (Photo by David Becker/Getty Images)
Eric Paddock, brother of Las Vegas gunman Stephen Paddock, speaks to members of the media near his home, Monday, Oct. 2, 2017, in Orlando, Fla. Paddock told the Orlando Sentinel: "We are completely dumbfounded. We can't understand what happened." (AP Photo/John Raoux)
Eric Paddock holds a photo of him, at left, and his brother, Stephen Paddock, at right, outside his home, Monday, Oct. 2, 2017, in Orlando, Fla. Stephen Paddock opened fire on the Route 91 Harvest Festival on Sunday killing dozens and wounding hundreds. (AP Photo/John Raoux)
This undated photo provided by Eric Paddock shows him at left with his brother, Las Vegas gunman Stephen Paddock at right. Stephen Paddock opened fire on the Route 91 Harvest Festival on Sunday, Oct. 1, 2017, killing dozens and wounding hundreds. (Courtesy of Eric Paddock via AP)
Eric Paddock, brother of Las Vegas gunman Stephen Paddock, speaks to members of the media near his home, Monday, Oct. 2, 2017, in Orlando, Fla. Paddock told the Orlando Sentinel: "We are completely dumbfounded. We can't understand what happened." (AP Photo/John Raoux)
Melissah Burke and her husband Stephen, of Seattle, walk along the Las Vegas Strip near Mandalay Bay hotel and casino Monday, Oct. 2, 2017, in Las Vegas. The couple, who were attending the music festival last night where a mass shooting occurred, found refuge in a nearby apartment and casino. (AP Photo/Ronda Churchill)
A woman hides inside the Sands Corporation plane hangar after a mass shooting in which dozens were killed at the Route 91 Harvest Festival on Sunday, Oct. 1, 2017, in Las Vegas. (Al Powers/Invision/AP)
People drive a cart through the scene of a mass shooting at a music festival on the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. (AP Photo/John Locher)
Paddock fired “with intent”
Authorities the Las Vegas shooter fired at aviation fuel tanks “with intent.” Lombardo told reporters Friday that Stephen Paddock shot at the fuel tanks at McCarran International Airport near the Mandalay Bay hotel, where he opened fire onto a concert crowd below.
Paddock killed 58 people before shooting himself.
Lombardo says the airport is reviewing safety measures and has contacted experts in fuel storage but that there’s a low probability aviation fuel could be ignited by gunfire.
Still sorting facts
Nearly two weeks after the Las Vegas mass shooting, authorities have yet to sort out the basic facts. On Monday, police said Stephen Paddock sprayed 200 rounds into the hallway, wounding an unarmed security guard in the leg.
They said six minutes later, he unleashed his barrage of bullets on the festival crowd and then took his own life.
MGM Resorts International, which owns the Mandalay Bay, said Thursday it was no more than 40 seconds between the time the guard called for help and Paddock opened fire on the crowd.