Authorities are investigating after a teen girl reported being sexually assaulted by a man at the Shirley Avenue Bathhouse on Revere Beach Tuesday evening.
State police said the victim reported her attacker tried talking to her while she was using an outdoor shower at the bathhouse around 7 p.m.
When she tried getting away from him, he allegedly grabbed her to prevent her from leaving and sexually assaulted her.
Police said there were many people on the beach near the bathhouse at the time of the attack.
When the victim got away, she reported what happened to a family member whom she had gone to the beach with. After they left, the family member took the girl to the Massachusetts State Police Barracks on Revere Beach to report the assault.
The teen was interviewed and then taken to a local Boston hospital for evaluation, and troopers and a state police chemist went to the bathhouse to look for and document evidence.
State police said the suspect was described as being six feet tall with a slender build and braided hair. Prior to the assault, he may have been wearing a dark-colored tank top and black shorts and was riding a mountain bike on and near the beach. During the assault he was believed to be wearing a bathing suit and no shirt.
Officials also believe prior to the assault the suspect was seen following a young woman, not the assault victim, and that he may have tried to speak to her.
Police are checking nearby surveillance cameras to see if they caught anything.
The alleged assault was surprising for many people visiting Revere Beach Wednesday.
"That is really, really scary, my goodness," said Dot Hamilton.
"It's shocking, definitely shocking that something like that could happen in broad daylight with so many people around all the time and it's a little dismaying because this is a place you're supposed to be happy and comfortable," beachgoer Cheryl Hamilton added.
Terrence Stephens, a teen who also uses the bathhouse, said he was horrified to learn about the alleged attack.
"Me and my girlfriend and my friends always come down here everyday, we're teenagers of course, and they're always walking up and down this area, taking showers, and so it's kind of scary to know that something like that could happen here," he said.
Anyone who may have seen any part of this incident or has knowledge of the suspect is asked to call state police at 781-284-0038.
The investigation is ongoing.