A scare that sent two Port Washington schools into lockdown this week turned out to be an end-of-year game for senior students, according to Schreiber High School’s principal.

On Wednesday, the school received a notification from the Port Washington Police Department about a potentially armed individual near the community.

However, principal Kathryn Behr said in a letter to parents that it was actually a student playing “senior assassin,” a game where competitors use water guns to eliminate their targets.

"We understand that it seems like a really innocent game that students in their senior year of high school are participating in island-wide. The risks are simply too high and not worth the dangers,” said Behr.

The principal has instructed all students to stop playing the game immediately.