Mexico has announced increased security measures at major tourist destinations after a deadly shooting at the Teotihuacan pyramids raised fresh concerns ahead of the upcoming FIFA World Cup.

Authorities said a lone gunman opened fire on tourists Monday at the UNESCO World Heritage site, killing one Canadian visitor and injuring at least a dozen others.

President Claudia Sheinbaum acknowledged security gaps at the site, describing the attack as an “isolated incident” but vowing steps to prevent a recurrence.

Security Secretary Omar García Harfuch said forces have been ordered to immediately strengthen protection at archaeological sites and key tourist areas nationwide. Measures include increasing the presence of the National Guard, enhancing security checks and expanding surveillance systems.

The shooting comes less than two months before Mexico co-hosts the World Cup with the United States and Canada, with Teotihuacan expected to be a major attraction for visiting fans.

The government has already announced a broader security plan involving the deployment of around 100,000 personnel, along with military vehicles, aircraft and drones, particularly in host cities such as Mexico City, Guadalajara and Monterrey.

Despite officials highlighting a decline in homicides in recent years, the incident has renewed scrutiny over security preparedness as the global tournament approaches.