At least 10 suspected gang members were killed on Sunday in an early morning firefight with federal security forces in the dangerous northeastern Mexican city of Reynosa, the state government said.
The gunfight began at 4:30 a.m. CDT (0930 GMT) on Sunday, during an operation against a gang based in Reynosa, the Tamaulipas state government said in a statement.
At least 10 people died in the operation, which included members of the marines, army and federal police. Four members of the security forces were injured when a vehicle was upended.
As a result of the operation, other members of the gang blocked off major avenues in the city to try and halt the attack, the statement said.