CIUDAD JUAREZ, Mexico (AP) _ Two men walked into a restaurant across the border from El Paso, Texas, and opened fire with automatic weapons, killing six people and wounding three.

The motive for the attack Sunday night was not immediately clear, but investigators believed some of the victims may have been linked to a turf battle for control of the Juarez drug cartel.

Authorities did not immediately release the victims' names, but said four men and two women were shot and killed.

One customer, Manuel Cruz, said he left the Maxfim restaurant shortly before the shooting.

``I'm very lucky that I decided to go to another bar and when I returned for my car, I was surprised by what happened after I left,'' he told a local television station.

There have been no arrests, and authorities were looking for two men who fled the restaurant.

The reputed boss of the Juarez cartel, Amado Carrillo Fuentes, died in July following plastic surgery. His followers have reportedly been jockeying for control of the drug empire he left behind.