Laredo police spokesman Jose Baeza said Thursday that the suspects are charged with aggravated robbery and engaging in organized criminal activity.
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Police believe the suspects Tuesday robbed a worker servicing an outdoor ATM, fled in an SUV, then switched to a car that was later stopped at a Border Patrol checkpoint.
Baeza says five men in the car were detained after cash, believed from the holdup, was found in the trunk of the vehicle. A sixth suspect in another car was also arrested.
Laredo police have contacted Houston police investigating ATM-related robberies. In December, ATMs were stolen from the lobbies of five Houston hotels.