Monterrey, Mexico - Fifty-two inmates were killed and 12 injured in a brutal fight between two rival factions at a prison in northern Mexico on Thursday, the state governor said.

Nuevo Leon Gov. Jaime Rodriguez told a news conference the fight involved a faction led by a member of the infamous Zetas drug cartel.

Rescue workers could be seen bringing injured inmates from the Topo Chico prison in Monterrey, at least some with burns.

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