An investigation is underway after a swastika was found in a locker room at a Lawrence ice rink this week in Massachusetts.

Police said a local school superintendent contacted them after someone used a hockey puck to draw a swastika on a shower wall at the Lawrence Valley Forum.

The swastika incident was reported to North Andover High School’s administration on Tuesday after their hockey team used the facility. The school district’s superintendent said he contacted North Andover police. Lawrence police were also notified since the incident happened within Lawrence.

North Andover High School’s principal and superintendent, Gregg Gilligan, said in a letter to families that the school district is “committed to maintaining a school environment, including school-sponsored events, that is free of discrimination.”

“Words and symbols of intolerance and hate are wrong, unacceptable, and should not have a place in our society,” Principal Chet Jackson and Superintendent Gilligan wrote.