The gunman who killed 58 people and injured hundreds more at a Las Vegas concert had rented another room in the city on the weekend of an alternative music festival, investigators said.

Sheriff Joseph Lombardo told reporters that Stephen Paddock rented a room through Airbnb at the Ogden hotel in downtown Las Vegas but didn't know why.

He said investigators have recovered items and video from the hotel, which was rented over the weekend of 22 to 24 September.

The Life is Beautiful festival featured Chance the Rapper, Muse, Lorde and Blink-182.

Sheriff Lombardo made the revelation at a news conference where he provided a detailed timeline of events.

Calling Paddock “disturbed and dangerous", he added that the number of injured was now confirmed at 489 people, although many had been released from the city's hospitals.

His comments came shortly after Paddock’s girlfriend said that she had no idea he was planning an attack on the Strip and was devastated for the victims.

A lawyer for Marilou Danley read a statement from her after she was questioned by FBI agents in Los Angeles about her boyfriend.

Las Vegas shooting – in pictures Show all 15 1 /15 Las Vegas shooting – in pictures Las Vegas shooting – in pictures People scramble for shelter at the Route 91 Harvest country music festival after gun fire was heard Getty Las Vegas shooting – in pictures People carry a person at the Route 91 Harvest country music festival after shots were fired David Becker/Getty Las Vegas shooting – in pictures People run from the Route 91 Harvest country music festival after gun fire was heard David Becker/Getty Las Vegas shooting – in pictures A handout photo released via Twitter by Eiki Hrafnsson (@EirikurH) showing concertgoers running away from the scene (C) after shots range out at the Route 91 Harvest festival on Las Vegas Boulevard EPA/Eiki Hrafnsson Las Vegas shooting – in pictures People lie on the ground at the Route 91 Harvest country music festival after hearing gun fire Getty Las Vegas shooting – in pictures A man in a wheelchair is taken away from the Route 91 Harvest country music festival after hearing gun fire David Becker/Getty Las Vegas shooting – in pictures People stand on the street outside the Mandalay Bay hotel near the scene of the Route 91 Harvest festival on Las Vegas Boulevard EPA/Paul Buck Las Vegas shooting – in pictures FBI agents confer in front of the Tropicana hotel-casino after a mass shooting during a music festival on the Las Vegas Strip Reuters/Las Vegas Sun/Steve Marcus Las Vegas shooting – in pictures Las Vegas police run by a banner on the fence at the Route 91 Harvest country music festival grounds after shots were fired David Becker/Getty Las Vegas shooting – in pictures An injured person is tended to in the intersection of Tropicana Ave. and Las Vegas Boulevard after a mass shooting at a country music festival Ethan Miller/Getty Las Vegas shooting – in pictures Metro Police officers pass by the front of the Tropicana hotel-casino after a mass shooting at a music festival on the Las Vegas Strip Reuters/Las Vegas Sun/Steve Marcus Las Vegas shooting – in pictures A woman sits on a curb at the scene of a shooting outside of a music festival along the Las Vegas Strip AP/John Locher Las Vegas shooting – in pictures A cowboy hat lays in the street after shots were fired near a country music festival in Las Vegas Getty Las Vegas shooting – in pictures Las Vegas Metro Police and medical workers stage in the intersection of Tropicana Avenue and Las Vegas Boulevard South after a mass shooting at a music festival on the Las Vegas Strip Reuters/Las Vegas Sun/Steve Marcus Las Vegas shooting – in pictures Sheriff Joe Lombardo (2-R) speaking during a press briefing in the aftermath of the active shooter incident on Las Vegas Boulevard EPA

Ms Danley was out of the country at the time of the attack and said Paddock sent her to see her family in her native Philippines.

Meanwhile, President Donald Trump traveled to Las Vegas to meet with law enforcement officers and survivors of the shooting outside the Mandalay Bay hotel casino.

FBI Deputy Director Andrew McCabe , speaking at a cybersecurity forum in Boston, said investigators are busy "reconstructing the life, the behaviour, the pattern of activity of this individual and anyone and everyone who may have crossed his path in the days and the weeks leading up to this horrific event."