CIUDAD JUAREZ, Mexico - Prosecutors say a gang of gunmen has killed six men in a bar in Juarez. Among the victims was an airman stationed at Holloman Air Force Base near Alamogordo, New Mexico.
Prosecutors in northern Chihuahua state say another man was wounded in the attack.
State prosecutors' spokesman Arturo Sandoval says the attack occurred early Wednesday in the Amadeus bar.
Sandoval confirmed to ABC-7 that one of the men killed was a U.S. citizen. He identified the man as 26-year-old David Booher. Sandoval said Booher's family identified him.
Booher was a staff sergeant with the 49th Fighter Wing, Holloman Air Force Base officials said.
A Holloman spokesman said airmen at the air base are prohibited from traveling into Juarez.
There was no immediate information on the motive for the attack, but the methods are similar to those used by drug cartels.
Chihuahua state police identified two of the other victims as Luis Fabián Carbajal Hernández, 24, and Omar Osvaldo García Cabrales, 32. Three other male victims who appeared in their 30s were not identified.
Authorities have not confirmed if any of the other victims are U.S. citizens.
On Thursday, the Chihuahua state attorney general's office released graphics showing the positions of the shooting victims in the bar.

Booher was shot once in the head and was identified through his New Mexico driver's license, the attorney general's office said.
Police said 30 shell casings from at least four different weapons were recovered at the scene.
The wife of a man who survived the attack told Channel 44, ABC-7's news partners, that she wants to bring him to a hospital in El Paso.
A Fort Bliss spokeswoman said they had no information that any Fort Bliss soldiers were involved in the incident. Fort Bliss currently bans service members from traveling to all Mexican cities on the U.S.-Mexico border and to the entire state of Chihuahua.
To read the policy, click to the link to the left.
In a separate shooting, four men were found dead outside the Pedro E. Medina Gonzalez primary school in another part of the city, according to the Associated Press.
Written for KVIA.com by Web Producer Annette Arrigucci
The Associated Press contributed to this report.