Two teenage gunmen opened fire at a mosque in San Diego on Monday, killing three men before later killing themselves, according to police.
Authorities said the attack at the Islamic Center of San Diego is being investigated as a possible hate crime.
A separate study published in April by the Center for the Study of Organized Hate found a sharp rise in anti-Muslim rhetoric from Republican elected officials since early 2025. Researchers cited more than 1,100 social media posts by Republican governors and members of Congress that the group classified as anti-Muslim bigotry.