MASTIC BEACH, N.Y. – Police are investigating a brawl that broke out at a high school graduation on Long Island that left a pregnant woman bleeding from her head.

The fight occurred in the parking lot of William Floyd High School shortly after the Class of 2017 received their diplomas on Sunday, and a video of the brawl shows several girls attacking 21-year-old Bianca Bouchard as she laid on the ground, CBS New York reports.

Bouchard told the news site she’s 15 weeks pregnant with her third child.

“I didn’t mean to ruin anyone’s graduation, you know, like, I was there for someone who was graduating,” she said.

In the video, several folks help to pull Bouchard’s attackers away, and she was pulled to her feet with blood streaming down her face and her dress torn to tatters. As she made her way to an SUV, the teens attacked again, forcing police to intervene.

“You can see on the video a girl in a blue dress runs up and kicks me in the head with her heel and that’s what caused all the bleeding,” she said, according to the New York Daily News. “In the back of my head there’s a scar.”

Bouchard said all of the blows landed on her head, and her baby is safe.

“It’s really sore,” she told CBS New York. “I’m in the house because I blacked out a little when I was outside.”

Bouchard told the New York Post she was defending her 15-year-old sister in a family dispute involving another relative by marriage when she was attacked.

“My sister fought one of the girls who was graduating,” she said. “We always got along. My sister and the other girl had been going back and forth on Facebook.”

William Floyd School District officials issued a statement about the brawl to WNCN.

“We are disappointed by the actions of those who instigated the incident on what was a joyous occasion for our students and their families. As a school and community, we won’t let the small number of spectators involved in inappropriate behavior overshadow the accomplishments of so many wonderful students and their families celebrating graduation day,” officials wrote.

“Many of our students are headed to the finest colleges and universities in the world, will serve honorably in the armed forces or begin the initial steps of their careers after learning valuable skills in one of our career and technical education academies. Graduation day is about them.”

CBS New York reports police are still investigating the fight, but have made no arrests.