Alleged Las Vegas concert gunman Stephen Paddock was a former accountant who appeared to be living a quiet retirement in a desert community.

The 64-year-old, of Mesquite, Nevada, had a pilot’s and hunting license and no criminal record, said authorities.

One former neighbor said the suspect was a professional gambler and “weird”.

There was reason to believe Paddock had a history of psychological problems, a US official told Reuters news agency.

It is the deadliest shooting in modern US history, with the toll surpassing the 49 killed at a nightclub in Orlando, Florida, in June 2016.