MEXICO CITY (AP) — Mexico’s government said it was beefing up security at tourist sites after a man opened fire on tourists at pyramids outside of Mexico City less than two months before the FIFA World Cup.

The shooting comes as Mexico is preparing to heighten security across the country for the FIFA World Cup this summer.

A Canadian tourist was killed and 13 others were injured, including two children, after a man opened fire at the historic Teotihuacán pyramids in Mexico on Monday.

A visit to the world-famous Teotihuacán site devolved into chaotic moments as tourists jumped from atop the pyramids and tried to duck amid the spray of gunfire.

A new Great Pyramid theory suggests ancient Egyptians used integrated edge ramps built into the structure itself.