Caught on Video: Possible Mexican Military Incursion on U.S. Soil?

A local news station in the Rio Grande Valley is investigating a video captured near one of the U.S.-Mexico border checkpoints last December. The video seems to show a military-style truck loaded with armed men crossing from Mexico into Texas.

The video -- obtained by KRGV -- then seems to show the armed men conducting a roadside vehicle search on the U.S. side of the border before heading back south into Mexico.

We counted at least a dozen armed men in the back of the truck. The vehicle travels down the bridge toward the U.S. Customs checkpoint. Its driver makes a U-turn just before reaching the lines of cars there. It then starts back south toward Mexico. The men pull over and search a vehicle for a few minutes then resume their trek south. The presumed soldiers then cross back over the boundary toward Mexico.

Mexican military incursions along the southern border are rare but not unheard of. Last March, Mexican helicopters were photographed flying over a U.S. residential neighborhood at least one mile north of the international border.

In 2008, a small Mexican military unit reportedly carried out home invasion and an assassination order in Arizona that left one dead a residential neighborhood littered with bullets. At the time, Phoenix police believed the soldiers had been recruited by drug traffickers.

Additionally, the U.S. Border Patrol warned its agents in 2006 to be wary of Mexican soldiers crossing the border who are "trained to escape, evade and counterambush" if detected. At the same time, the Minutemen citizen border patrol group released video of men it claimed to be Mexican military operatives who had illegally crossed the border in Arizona.