Rhode Island beach reopens after mysterious boom; officials say there's no threat to public

A Rhode Island beach has reopened a day after an unexplained blast knocked a beachgoer to the ground but investigators concluded there was no public threat.

State Department of Environmental Management spokeswoman Rayna Maguire says Salty Brine State Beach in Narragansett was open again Sunday. She says there was no new information on the cause.

State police Col. Steven O'Donnell said Saturday night the investigation found no evidence an explosive device caused the loud boom heard by people on the beach.

The beach was evacuated Saturday morning after witnesses reported a possible explosion. A woman sitting in a chair at the tideline was knocked into an adjacent rock breakwater.

The woman was taken to a hospital. Officials say she was conscious and alert.