The shadow of United States-style mass shootings has once again loomed over Mexico’s state of Coahuila following a brutal attack on a secondary school in Torreón. Two brothers, motivated by online radicalization and a desire to emulate high-profile American mass shooters, murdered a school official and wounded four others in a violent assault.

The incident occurred at the secondary school of the Ejido La Unión on the outskirts of Torreón. At approximately 8:30 a.m., as students were transitioning between classes, the attackers—armed with machetes—began a targeted assault. While students were able to barricade themselves in classrooms, the attackers reached the school’s entrance and a bathroom area. The attack resulted in the death of the school’s subdirector and left two teachers (one in critical condition), a student, and another woman injured.

State Prosecutor Federico Fernández reported that the perpetrators were twin brothers.