EFEMexico City

An attack by gunmen on a Mexican military convoy in the northern border city of Reynosa resulted in the deaths of four civilians, authorities in the state of Tamaulipas said Thursday.

A soldier and four other civilians were injured, the Tamaulipas Coordination Group, a federal-state security task force, said in a statement.

The incident took place Wednesday night as a military convoy encountered a group of gunmen traveling in five pick-up trucks.

The gunmen began shooting and within moments, armed assailants in a car pulled out in front of the convoy and opened fire at one of the vehicles, according to the official statement.

The bullets shattered the windshield of the army vehicle, whose driver lost control, allowing the vehicle to crash into two cars and a taco stand.

Killed were a 4-month-old baby, her mother and grandmother, as well as a 26-year-old man.

The gunmen "took advantage of the confusion to flee," the Tamaulipas Coordination Group said, adding that authorities "are supporting the victims' families with legal advance and hospital and funeral costs."

Tamaulipas, which borders Texas, has been for several years the scene of a brutal turf war between the Gulf and Zetas drug cartels.