Overview
- At the Pyramid of the Moon on Monday, a lone attacker opened fire from partway up the steps, killing a Canadian woman and injuring at least 13 people before dying by suicide.
- Authorities identified the shooter as 27-year-old Julio César Jasso Ramírez and said seven victims suffered gunshot wounds, with those hurt ranging in age from 6 to 61.
- Police and forensic teams recovered a handgun, a knife and dozens of rounds at the site, and the injured included nationals from the United States, Colombia, Brazil, Russia, Canada and the Netherlands.
- Officials said the assailant planned the attack after multiple prior visits and they found a backpack with materials referencing the April 1999 Columbine massacre, a detail echoed by a survivor who heard him mention the anniversary.
- The National Institute of Anthropology and History closed the UNESCO-listed complex for investigation, with federal and National Guard units deployed, and officials said it would reopen under expanded security as Mexico readies for World Cup tourism.