How the Las Vegas Strip shooting unfolded

With 58 killed and more than 500 injured, the Oct. 1 Las Vegas Strip shooting was the deadliest in modern American history. Here’s a minute-by-minute look at how it happened.

[Frantic switchboard calls, geometry of fire, led police to killer on Mandalay Bay’s 32nd floor]

9:40 p.m. Pacific time
Jason Aldean, a country music singer, began his performance at the Route 91 Harvest, an annual Las Vegas music festival. There were more than 22,000 people in attendance.

Around 10:02 p.m.
The shooter shot a security guard in the hallway on the 32nd floor of the Mandalay Bay Resort.

10:08 p.m.
The shooter began to fire shots into a concert venue across the street. He was positioned in a large suite that contained two rooms, according to Las Vegas Sheriff Joseph Lombardo. He is believed to have fired from both rooms to get different angles.

Here’s the audio from the police scanner when the shots were first reported.

Warning: These audio clips contain content that may be disturbing to some readers.

The police quickly identified that the shots were coming from Mandalay Bay, but briefly believed there were other shooters at other locations as well.

Eyewitnesses described people running for exits or hiding behind trucks, trampling each other in the process. Some reported seeing concertgoers take shelter at nearby hotels and restaurants.

It’s unclear how many of the injuries resulted from gunshot wounds versus the pandemonium as people tried to exit the venue.

[The lives lost in Las Vegas: Here are the stories of those who died]

Around 10:20 p.m.
The shooting reportedly stopped after about ten to fifteen minutes, though estimates vary.

10:24 p.m.
The police locate the shooter’s room on the 32nd floor of the hotel. They begin preparing to enter the room. At 10:27, the gunman shoots into the hall, and a bullet ricochets into a security guard’s leg. A camera hidden in a room-service cart gave the shooter a view of the hall outside his room.

When police busted into Room 135 on the 32nd floor of the Mandalay Bay Resort and Casino, they found Stephen Paddock’s body, 23 guns and evidence of the carefully planned attack.

11:25 p.m.
A SWAT team stormed the room, using explosives to enter. They saw the shooter had killed himself, according to Sheriff Joseph Lombardo. There were 23 firearms found in the room.

Around 3:30 a.m.
The police identified the shooter as Stephen Paddock, a 64-year-old white male from Mesquite, Nev., which is near Las Vegas. Lombardo said Paddock’s run-ins with Las Vegas police consisted only of one citation several years ago. The police called him a “lone wolf” but also identified his roommate Marilou Danley as a “person of interest.” They do not think she was involved in the shooting.

The police have not yet determined his motive and have not yet decided whether the shooting constitutes an act of terrorism. However, they believe he had no ties to international terrorist groups such as the Islamic State.

This was the deadliest mass shooting in America since 1966. Paddock was older than most who have carried out 130 similar attacks in the United States since 1966. The vast majority were ages 20 to 49.

Related links:

America’s deadliest shooting incidents are getting much more deadly

Video: The moment a gunman opened fire on a Las Vegas country concert

Stunned country music community mourns after mass shooting in Las Vegas

Photos: The scene after a gunman opened fire on concertgoers at a country music festival in Las Vegas