Mexican president admits the archaeological site outside Mexico City lacked security measures to prevent the attack.

Mexico's government is boosting security at tourist sites in preparation for the World Cup after a man opened fire at the Teotihuacan pyramids.

Several people were also injured in the incident on Monday at the popular Teotihuacán tourist site, say Mexican officials.

MEXICO CITY (AP) — In response to a shooting incident at the Teotihuacan pyramids, Mexico's government announced plans to increase security at tourist sites across the country. The shooting, which ...