Assailants armed with AK-47 assault rifles shot dead a police officer, the 11th law enforcement official to be gunned down this year in this violent border city, authorities said Friday.

The gunmen shot Jesus Segovia Sanchez at late Thursday, police spokesman Raul Galindo Vera said.

His partner, Sergio Omar Escobedo, was wounded in the shooting. He was listed in stable condition at a hospital after being shot four times — once in the side, once in the right leg, and once in each arm.

Police were investigating and had made no arrests.

Segovia's death brings to 116 the number of people murdered this year in Nuevo Laredo, a city of 300,000 across the Rio Grande from Laredo, Texas.

The city is in the midst of a turf battle between drug cartels battling for billion-dollar drug routes into the United States.