Officials from the City School District of New Rochelle are warning students about engaging in the game "senior assassin" following a call to police by a concerned bystander.

It's a game where graduating seniors play with toy water guns, aiming to eliminate other students by squirting them with water.

They say three students engaged in the unsanctioned game on Monday, using a toy water gun that resembled a real firearm.

The district says this led to a concerned bystander to contact the police.

"They were cuffed at the time, and they had their backpacks on the ground," says Steve Burrell, a New Rochelle resident who lives nearby. "Eventually, they went through their backpacks and shortly after that, they uncuffed them and let them go."

School officials say they are thankful that no one was hurt and that the situation was resolved.

“However, we must emphasize the inherent dangers of this game, which carries the potential for significant harm,” according to a statement from the school. “We want to reiterate that the unsanctioned ‘Senior Assassin’ game is strictly prohibited at New Rochelle High School, including our buildings, campus, buses and all school-related events, which are designated ‘safe zones.’ As Principal Artiles communicated in April, participation in this activity violates our code of conduct and will result in disciplinary consequences.”

Parents are also concerned.

"I'm not concerned about, not so much somebody getting hit with water, shot with water, but more of what could happen to these kids because it will get mistaken for a real weapon," says Marcela Tabares, a New Rochelle resident and parent.

"It's not cool at all, especially with the stuff that happens with school and guns," says Martin Agosto, a Bronx resident.