Gunmen burst into an unregistered drug rehabilitation center in central Mexico and opened fire on July 1, killing 24 people and wounding seven. Police said three of the wounded were reportedly in serious condition.

Guanajuato is the scene of a bloody turf battle between the Jalisco cartel and a local gang, and the state has become the most violent in Mexico. Mexican drug gangs have killed suspected street-level dealers from rival gangs sheltering at such facilities in the past.

It was one of the deadliest attacks on a rehab center since 19 people were killed in 2010 in Chihuahua city in northern Mexico. The government spends relatively little money on rehabilitation, often making the unregistered centers the only option available for poor families.