Authorities are investigating yet another possible incursion by the Mexican Military.
Action 4 news spoke to the U.S. Customs and Border Protection Field of Operation Officers.
They confirm 33 soldiers riding in four hummers are now back in Mexico after crossing the Donna port of entry.
Immigration and Customs Enforcement processed the people and the vehicles.
An investigation has been launched.
This hasn't been the first time either. A Mexican military humvee has crossed the border in nearby Mission, TX back in February, as well as near Laredo last month.