Overview
- The attack happened Thursday morning during a class change at Escuela Secundaria General No. 13 in ejido La Unión, Torreón, and left subdirectora Nery Edith Narváez González dead.
- Two 18‑year‑old brothers who were former students were subdued by teachers, classmates and neighbors and handed to municipal police; they remain at the disposal of ministerial authorities.
- State forensic teams report the use of cutting weapons and small explosive-type devices, and investigators say they have not confirmed firearms or large explosives in the scene.
- Officials gave differing early casualty counts that were later updated; several students and staff were treated in hospital and at least one injured pupil has been reported seriously hurt as medical exams continue.
- The federal security cabinet and the SEP have joined Coahuila authorities in the probe, offering institutional support to the school and signaling possible legal and mental‑health follow‑up as investigations continue.