There are threats to American personnel beyond those serving in the Middle East.
Personnel at the U.S. consulate are being warned to restrict their movement after gunbattles across the from Texas broke out leaving six people dead.
Mexico sent additional security and late last night a state police officer was shot and killed and a deputy wounded.
The Mexican governor in the region blames the Northeast cartel, a faction of the Zetas.
Nuevo Laredo is one of the Mexican cities where the U.S. government has sent asylum seekers to wait as their cases are decided.