MEXICO CITY — Mexico's government announced Tuesday it is strengthening security at tourist sites following a shooting at the Teotihuacan pyramids that killed one Canadian tourist and injured 13 others. The attack occurred Monday atop one of the pyramids, less than two months before the FIFA World Cup.

Mexican Security Secretary Omar Garcia Harfuch said security forces have been ordered to immediately strengthen security at archaeological sites and key tourist destinations across the country. The government will increase the presence of the Mexican National Guard at key sites, boost security checks and fortify surveillance systems to identify and prevent threats against citizens and visitors.

"Our obligation as a government is to take the appropriate measures to ensure that a situation like this does not happen again. But clearly, we all know — Mexicans know — that this is something that had not previously taken place," President Claudia Sheinbaum said on Tuesday.

The Teotihuacan pyramids, located about an hour from Mexico City, are a UNESCO World Heritage Site and one of Mexico's most frequented tourist attractions. The site was slated to be a key destination for visitors during the World Cup festivities. Days before the shooting, local lawmakers pushed forward an initiative to revive a nighttime interactive light show projected on the pyramids for World Cup visitors. The light show had been suspended following the COVID-19 pandemic.

The attacker appeared to be motivated by outside influences, particularly the 1999 Columbine massacre in Colorado. Sheinbaum promised there would be no risk for fans attending the tournament and met with FIFA representatives to assess security for World Cup matches to be played in Mexico. FIFA president Gianni Infantino said he had full confidence in Mexico as a host country.

The government has deployed 100,000 security personnel across the country, particularly concentrated in Mexico City, Guadalajara and Monterrey. More than 2,000 military vehicles, along with dozens of aircraft and drones, will be deployed for World Cup security, and security perimeters will be established around areas such as stadiums and airports in key cities.

"As you can see, we are very prepared for the World Cup," Sheinbaum said. Homicides have dipped sharply since Sheinbaum took office to the lowest levels in a decade. The government has removed a number of top cartel leaders, and fentanyl seizures at the U.S.-Mexico border have dipped. A surge of cartel violence occurred in February in Guadalajara, triggered by the killing of Mexico's most powerful cartel boss.