The state's coordinating group of state and federal law enforcement says the confrontations occurred throughout the day Sunday in Madero and Tampico. The statement late Sunday did not name the criminal groups or say if the attacks were related.
Tamaulipas, one of Mexico's most violent states, has been hit by infighting in the once dominant Gulf Cartel, which has also come under attack from its rival, the Zetas.
The statement said four people were killed in separate shootouts in Madero, with two more bodies found separately. Six people died in a shootout in Tampico. Two more were found shot to death in other locations, one inside an ice cream store.
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