Stephen Paddock, who had worked previously as an accountant, was "not an avid gun guy at all," though he had a couple of handguns and a long gun, he said.

Authorities said they had recovered a weapons cache including firearms, explosives and ammunition from a house owned by Paddock.

Sheriff Joseph Lombardo said officers searching the house in Mesquite, Nevada recovered "in excess of 18 additional firearms, some explosives and several thousand rounds of ammo, along with some electronic devices we're evaluating at this point."

The brother also said that their father was bank robber Benjamin Hoskins Paddock who was on the FBI's 10 most wanted list until 1977.

Isil claims responsibility

The Islamic State has claimed shooting, but US officials have said no there is no known link to international terrorism.

Through Islamic State of Iraq and the Levant’s official Amaq news channel, the group said Paddock converted to Islam a few months ago.

They said the attack was carried out by a “soldier” of the caliphate and was done “in response to calls to target coalition countries.”