Gunman kills Canadian woman, injures 13 at Mexican pyramids.

A gunman killed a Canadian woman and injured at least 13 tourists at Mexico's Teotihuacan pyramids on April 20, 2026. The attacker, identified as 27-year-old Julio César Jasso Ramírez, acted alone, shooting himself after the attack. Authorities found materials linked to the 1999 Columbine High School shooting at the scene, and officials are investigating potential external influences as Mexico prepares to host the 2026 World Cup.