Sept. 27 (UPI) -- Masked men broke into a drug rehabilitation center in the northern Mexico's Chihuahua city and opened fire, killing more than a dozen people, prosecutors said.
The Chihuahua prosecutor's office said an unknown number of gunmen used large-caliber weapons in the attack Tuesday just before 10 p.m. at Familias Unidas center. Witnesses said the gunmen wore military-style clothing.
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