Trump sends 'warmest condolences', calls Las Vegas shooting as terrible

Washington: US President Donald Trump sent his "warmest condolences" on early Monday to the victims and families of a shooting at a concert in Las Vegas which has killed at least 50 people.

"My warmest condolences and sympathies to the victims and families of the terrible Las Vegas shooting. God bless you!" Trump wrote on Twitter in response to what is the deadliest mass shooting in modern US history.

White House spokesman Sarah Sanders said separately that the president had been briefed on "the horrific tragedy in Las Vegas" on Sunday night.

"We are monitoring the situation closely and offer our full support to state and local officials," she said."All of those affected are in our thoughts and prayers."

Over 50 people were killed and at least 200 got injured on Sunday night when a 64-year-old gunman called Stephen Paddock opened fire on fans at a US country music concert on the Las Vegas Strip, police said.

The gunman, who police said was a local resident was killed after being "engaged" by officers who responded to report of gunfire from the 32nd floor of the Mandalay Bay, a hotel-casino next to the concert venue.

The Nevada sheriff said they believe this was a "lone wolf" attack but said they are looking for a roommate of the dead suspect as a person of interest.

Revellers screamed and fled in panic as a steady stream of automatic gunfire rang out at the venue shortly after 10:00pm local time, footage captured on smart phones showed.

Thousands of fans were attending the concert next to the Mandalay Bay which was part of a three-day country music festival known as Route 91.