A 21-year-old Texas National Guardsman was one of two men murdered Wednesday in the violent border city Ciudad Juarez, Mexico, the FBI says.

El Paso FBI Officer Michael Martinez says soldier Jose Gil Hernandez, an El Paso native, was shot Wednesday afternoon in the Colonia Revolucion Mexicana in Ciudad Juarez.

"We were informed yesterday afternoon of the incident at 4pm Mountain Standard Time. Right now we are determining what happened so we can determine if we will open an investigation and what type of investigation it will be," Martinez told Fox News.

The identity of the other victim was not available.

Martinez said the FBI is working closely with the Army's Criminal Investigation Division but the fact that the incident happened in Mexico, and specifically in Juarez, could hinder an investigation.

"Liaisons are in Mexico right now gathering information. Then we will determine a course of action," he said.

Ciudad Juarez has become one of the world's deadliest cities amid a turf war between the Sinaloa and Juarez drug cartels. More than 2,000 people have been killed this year in the city, which is across the border from El Paso.

The Associated Press contributed to this report