Police surrounded a motel near Downtown Long Beach Monday afternoon while they searched for a sexual assault suspect, according to authorities.

Police said the assault happened around 2:20 p.m. in the area of Atlantic Avenue and Broadway. A woman told investigators she was with a man she’d met earlier, and, once they were alone, “He brandished a firearm and sexually assaulted her,” LBPD spokeswoman Arantxa Chavarria said.

Officers set up a perimeter around the Inn of Long Beach, but after checking two rooms, they confirmed the suspect had already left the area.

Police didn’t immediately have a detailed description of the suspect available. They believe the attack is an isolated incident, Chavarria said.