A hotel worker has said he alerted staff to report a gunman had opened fire before the suspect shot dead 58 people at a Las Vegas music festival.

Stephen Schuck said he was responding to a jammed fire door on the 32nd floor when he heard gunfire and spotted a colleague who had been shot.

He called dispatchers and told them to call police as the gunman sprayed bullets down the hallway, he said.

His account has intensified questions about why the gunman was not stopped.

“As soon as I started to go to a door to my left the rounds started coming down the hallway,” Mr Schuck said on Wednesday.

“I could feel them pass right behind my head