(CNN) After Stephen Paddock opened fire on concertgoers from his perch stories above them, officers cautiously crept up a hallway as they prepared to storm the gunman's Las Vegas suite.

"Breach. Breach. Breach," a voice said on a police radio. Then, a loud blast was heard.

Las Vegas police on Wednesday released body camera footage from officers who entered Paddock's hotel suite on the 32nd floor of the Mandalay Bay Resort and Casino immediately after October's mass shooting.

The footage showed the moments before officers swarmed the room, where Paddock's body was discovered. The video also shows police sweeping the premises.

Paddock, 64, killed 58 people and injured almost 500 when he opened fire on 22,000 concertgoers.

One video clip shows that police moved forward after the explosion and waited in a doorway as the hotel's alarm went off.

"There's a 413 on the ground," an officer said, giving the police code for a person with a gun.

Officers approached Paddock's door, which was blocked by a room service cart. "Looks like it might be a camera of some sort," one officer said.

Officers noted there were also multiple cameras, according to the footage.

More officers rushed past.

"Hold on, hold on," another officer said.

As officers entered the suite, they noticed more cameras pointing down the hallway, and that the rooms were connected.

Officers cleared the suite room by room, searching under the bed and in closets with dogs.

911 call audio will also be released.

Sheriff Joe Lombardo of the Las Vegas Metropolitan Police Department said video footage, 911 call audio and documents relating to the October 1 massacre would be released on a rolling basis starting with the body camera footage from two officers.

"I don't know how this footage will be played in the media, but I want to warn you, if you are a survivor or a family who lost a loved one, you should know the video from this concert is disturbing and graphic," he said.

Photos: Mass shooting at Las Vegas music festival Debris is scattered on the ground Monday, October 2, at the site of a country music festival held this past weekend in Las Vegas. Dozens of people were killed and hundreds were injured Sunday when a gunman opened fire on the crowd. Police said the gunman fired from the Mandalay Bay hotel, several hundred feet southwest of the concert grounds. It is the deadliest mass shooting in modern US history. Hide Caption 1 of 30 Photos: Mass shooting at Las Vegas music festival Broken windows of the Mandalay Bay are seen early in Las Vegas on Monday. Police said the gunman fired on the crowd from the 32nd floor of the hotel. Hide Caption 2 of 30 Photos: Mass shooting at Las Vegas music festival People cross a street near the Las Vegas Strip just after sunrise on Monday. Thousands were attending the music festival, Route 91 Harvest, when the shooting started. Hide Caption 3 of 30 Photos: Mass shooting at Las Vegas music festival People embrace outside the Thomas & Mack Center after the shooting. Hide Caption 4 of 30 Photos: Mass shooting at Las Vegas music festival Police arrive at the Sands Corporation plane hangar where some people ran to safety after the shooting. Hide Caption 5 of 30 Photos: Mass shooting at Las Vegas music festival A woman cries while hiding inside the Sands Corporation plane hangar. Hide Caption 6 of 30 Photos: Mass shooting at Las Vegas music festival Concertgoers dive over a fence to take cover from gunfire on Sunday night. Hide Caption 7 of 30 Photos: Mass shooting at Las Vegas music festival Police take position outside the Mandalay Bay. Hide Caption 8 of 30 Photos: Mass shooting at Las Vegas music festival A man lays on top of a woman as others flee the festival grounds. The woman reportedly got up from the scene. Hide Caption 9 of 30 Photos: Mass shooting at Las Vegas music festival Hide Caption 10 of 30 Photos: Mass shooting at Las Vegas music festival People are seen on the ground after the gunman opened fire. Hide Caption 11 of 30 Photos: Mass shooting at Las Vegas music festival People run from the festival grounds. Hide Caption 12 of 30 Photos: Mass shooting at Las Vegas music festival A woman is moved outside the Las Vegas Tropicana resort. Multiple victims were being transported to hospitals in the aftermath of the shooting. Hide Caption 13 of 30 Photos: Mass shooting at Las Vegas music festival People are searched by police at the Tropicana. Hide Caption 14 of 30 Photos: Mass shooting at Las Vegas music festival An ambulance leaves the intersection of Las Vegas Boulevard and Tropicana Avenue. Hide Caption 15 of 30 Photos: Mass shooting at Las Vegas music festival A man in a wheelchair is evacuated from the festival after gunfire was heard. Hide Caption 16 of 30 Photos: Mass shooting at Las Vegas music festival Victims of the shooting are tended to in the street. Hide Caption 17 of 30 Photos: Mass shooting at Las Vegas music festival Concertgoers help an injured person at the scene. Hide Caption 18 of 30 Photos: Mass shooting at Las Vegas music festival People gather around a victim outside the festival grounds. Hide Caption 19 of 30 Photos: Mass shooting at Las Vegas music festival A couple huddles after shots rang out at the festival. Hide Caption 20 of 30 Photos: Mass shooting at Las Vegas music festival An injured woman is helped at the Tropicana. Hide Caption 21 of 30 Photos: Mass shooting at Las Vegas music festival Police and emergency responders gather at the intersection of Las Vegas Boulevard and Tropicana Avenue. Hide Caption 22 of 30 Photos: Mass shooting at Las Vegas music festival A police officer takes position behind a truck. Hide Caption 23 of 30 Photos: Mass shooting at Las Vegas music festival A crowd takes cover at the festival grounds. Hide Caption 24 of 30 Photos: Mass shooting at Las Vegas music festival Police officers advise people to take cover in the wake of the shooting. Hide Caption 25 of 30 Photos: Mass shooting at Las Vegas music festival People tend to a victim at the festival grounds. Hide Caption 26 of 30 Photos: Mass shooting at Las Vegas music festival Police stand at the scene of the shooting. Hide Caption 27 of 30 Photos: Mass shooting at Las Vegas music festival A woman sits on a curb at the scene of the shooting. Hide Caption 28 of 30 Photos: Mass shooting at Las Vegas music festival Police are deployed to the scene. Hide Caption 29 of 30 Photos: Mass shooting at Las Vegas music festival A man makes a phone call as people run from the festival grounds. Hide Caption 30 of 30

Lombardo said he expected the materials would be released weekly but would not say if the information would be posted on a website or emailed to media.

Court ordered release of footage

The Nevada Supreme Court ruled Friday that police had to release the bodycam footage and 911 call audio from the shooting.

Police had appealed an earlier ruling that the material be released, following requests by media, including CNN.

Lombardo denied that police were trying to be uncooperative. In a press briefing Tuesday, he cited cost, allocation of resources and potential further victimization of those affected by the shooting as reasons for delaying the release of footage, recordings and documents.

For example, the department had to reassign detectives from their "primary responsibility" to go over the reports and footage before they were made public, and some personnel would have to endure reliving the shooting, he said.

"I want the community to know the release of the videos, 911 and documents will have a significant impact on the victims of this tragedy. We believe the release of the graphic footage will further traumatize a wounded community," he said. "And for that, we apologize."

Lombardo said no employees will be made available for interviews, but said a final comprehensive report on the shooting will come.

Criticism of police

Police were criticized about their response when a timeline suggested there had been a six-minute delay between Paddock shooting a security guard and the gunman opening fire on the crowds below his hotel suite.

The timeline raised questions about why police didn't arrive on the scene sooner.

"In the public space, the word 'incompetence' has been brought forward. And I am absolutely offended with that characterization," Lombardo said on October 13

He said that during the six-minute gap, the security guard had been trying to access Paddock's room -- and that he had been shot around the same time the gunman started firing on concertgoers.

"So there is no conspiracy between the FBI, between the (Las Vegas Metropolitan Police Department) and MGM (the hotel owner). Nobody is attempting to hide anything in reference to this investigation," Lombardo said at the time.

"The dynamics and the size of this investigation requires us to go through voluminous amounts of information in order to draw an accurate picture."