Dhaka, Nov. 30 -- Gunmen opened fire in a bar in central Mexico, killing seven people and severely wounding five others on Saturday, police said.

Four people were found dead at the scene while three more died while receiving medical care after the shooting in Tula, around 60 miles (97 kilometers) north of the capital Mexico City, according to a police report.

Armed men had stormed the La Resaka bar, located in a working-class neighborhood of the city, early on Saturday, witnesses told police.

Federal and state security forces launched an operation but have yet to apprehend any suspects. Gangs involved in the trafficking of stolen fuel are known to operate in Hidalgo state, where Tula is located, but such mass killings are uncommon.

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