Mass Shooting At Las Vegas Music Festival

A day after the deadliest mass shooting in modern US history, authorities are learning more about Stephen Paddock, who fired into a crowd of thousands during a country music festival from a Las Vegas hotel suite, and the weapons he kept.

At least 59 people were killed and 527 were injured in the shooting that started late Sunday night. Police believe he killed himself, ending the massacre.

Police searched the gunman's home in Mesquite, Nevada, where they found at least 19 firearms, explosives, several thousand rounds of ammunition and some electronic devices.

In Paddock's 32nd-floor hotel suite at the Mandalay Bay Resort and Casino, police recovered 23 weapons, including a handgun, and multiple rifles -- some had scopes on them. Authorities also found several pounds of ammonium nitrate, a material used to make explosives, in his car.

As police uncovered more evidence, they're still piecing together a motive.

There was no explanation on why Paddock, a 64-year-old retired accountant who had never faced any notable criminal charges, unleashed a hailstorm of bullets into concertgoers.

-- Paddock was alive when he made first contact with officers. A team of six officers spoke with security at the Mandalay Bay Resort and Casino, where Paddock was staying, and searched the hotel floor-by-floor Sunday night before they found Paddock's suite, Clark County Sheriff Joseph Lombardo told reporters. Paddock had a large suite with two rooms, he said.

-- Paddock fired at the officers through the door and shot a security guard, Lombardo said. The guard was shot in the leg.

-- A SWAT team broke down the door, but Paddock had already killed himself, he said.

In the life-or-death situation, Dees said people were trying to take care of each other.

"It takes the worst of America to also see the best of America. Everybody was helping each other," he said.

Corrine Lomas also recalled the heroism of fellow concertgoers, risking their lives to save others as strangers pulled each other to hide and tended to the injured.

"A lot of really good people (were) holding people's wounds shut, trying to help them while everybody was just ducked down," she said.

"The firing went on forever," another witness Kimberly Chilcote said.

She and her husband ran in short bursts -- sprinting and hiding to avoid being targeted.

"There were purses and shoes everywhere ... there were bodies and blood," she said. "We just kept running."

Taylor Benge said he "could see a guy with a bullet wound right in his neck, motionless," several feet away. "From there on ... people just started dropping like flies."

Hundreds of Nevadans waited in long lines to give blood on Monday, to help victims of the shooting. US blood banks have enough blood to meet the immediate needs after the shooting, according to the chair of the AABB Interorganizational Task Force on Domestic Disasters and Acts of Terrorism, which assesses the need for blood collection after disasters.

People were also donating flights, housing, food, transportation and other goods to victims' family members who are coming to Las Vegas, said Chief Greg Cassell of the Clark County Nevada Fire Department.

Those looking for friends and family still missing after the attack can call 866-535-5654. Facebook has set up a crisis response page to help people determine whether their loved ones are safe.