A shooting at the Teotihuacan archaeological site near Mexico City has left multiple tourists injured and prompted Mexican authorities to announce a broad security overhaul at the country's major tourist destinations. The incident, one of the most serious attacks at a Mexican heritage site in recent memory, unfolded at one of the world's most visited ancient monuments.

Authorities identified the suspected gunman as Julio César Jasso and said he had been planning the attack for roughly two months. Investigators found materials in his hotel room related to the 1999 Columbine High School massacre in Colorado, raising concerns about the premeditated and ideologically influenced nature of the assault.

Witnesses at the scene described a chaotic situation as gunfire broke out among tourists exploring the famed pyramids. The attack has sent shockwaves through Mexico's tourism sector, which draws millions of visitors to Teotihuacan each year. The site, known for its monumental Pyramid of the Sun and Pyramid of the Moon, is one of the most iconic pre-Columbian ruins in the world.

The timing of the attack has amplified urgency for Mexican officials. Mexico is set to co-host the 2026 FIFA World Cup alongside the United States and Canada, and officials have pledged to substantially beef up security across tourist sites and major venues in the lead-up to the tournament. Critics and security analysts have noted that the shooting underscores longer-standing concerns about public safety in Mexico, a country that has grappled with high rates of violent crime.

Mexican authorities have not confirmed a specific motive beyond the evidence recovered from the suspect's hotel room. The investigation remains ongoing, and officials have not disclosed the nationalities or conditions of all individuals injured in the attack.