No man's land

A bus with illegal immigrants heads to the US border. Among the passengers is a group of 3 men and a woman who claim to be Ukrainian refugees. The truck is attacked by a gang of criminals but they are eliminated by the four refugees with astonishing ease. The passengers soon realize that they are not refugees, but Russian mercenaries who are going to carry out an attack on the capitol in Austin, Texas. AKA Tierra de nadie.