Five people, including two teenagers and a security guard, were killed in a shooting at the Islamic Center of San Diego, California’s largest mosque, on Monday. Police said two teenage gunmen opened fire around 11:40 a.m. local time before being found dead nearby, apparently from self-inflicted gunshots. Authorities are investigating the attack as a possible hate crime, though no official motive has been confirmed.

Police Chief Scott Wahl said the mother of one suspect had called police two hours earlier, reporting her son’s suicidal tendencies and missing firearms. Officers were already patrolling nearby areas when the shooting occurred. The mosque’s imam, Taha Hassan, described the attack as unprecedented and deeply distressing. Officials credited the slain security guard’s actions with preventing further casualties.

California Governor Gavin Newsom, New York Mayor Zohran Kwame Mamdani, Senator Lindsey Graham, and New Jersey Governor Mikie Sherrill condemned the attack and expressed solidarity with the victims. Security has been increased around mosques and other places of worship in several states following the incident, which occurred a week before Eid al-Adha amid heightened religious tensions in the U.S.