San Mateo police warn ‘Senior Assassin’ game may be mistaken for real threat

Police in San Mateo told residents this week that local high school seniors may be taking part in a game known as “Senior Assassin,” which involves participants using water guns or toy blasters that can resemble real firearms and may prompt emergency responses.

In an advisory Wednesday, the San Mateo Police Department said the activity, often played near graduation season, involves students attempting to “eliminate” one another with replica-style toy weapons. Officers warned the items can appear real from a distance or in low-light conditions, potentially alarming the public and triggering calls to police.