A deadly shooting at Teotihuacán in Mexico has left one tourist dead and several others injured after a lone gunman opened fire on visitors at the historic Pyramid of the Moon, then turned the gun on himself. Authorities say the attacker, identified as a Mexican national, acted alone with no links to organised crime, marking a rare but deeply troubling incident distinct from the country’s more common cartel-related violence. Investigators have pointed to possible copycat influences, especially since a witness heard the gunman referring to a mass school shooting at Columbine in the USA, exactly 27 years ago. The attack has caused real concern among football fans planning to come to the FIFA World Cup, which gets underway in Mexico City on 11 June. Leaders are seeking to reassure visitors about safety, emphasising that this incident is very atypical.  However, it has shocked locals and tourists alike, underscoring broader concerns about security, mental health, and the protection of public spaces.