An armed man climbed atop one of the ancient Teotihuacán pyramids (a major pre-Columbian archaeological site north of Mexico City) and opened fire on tourists on Monday, killing one Canadian national and injuring at least 13 others. Seven people were struck by gunfire, while additional injuries occurred as visitors fell while fleeing; those wounded included tourists from Colombia, Russia, and Canada. The attacker died from a self-inflicted gunshot wound, and Mexican President Claudia Sheinbaum has pledged a full investigation into the incident.