Two officials at the U.S. Embassy in Mexico were wounded Friday when federal police shot at their vehicle in the central state of Morelos, Mexican authorities said.

The wounds are not life-threatening, the federal Public Safety Office and the navy department said in a joint statement, adding that a Mexican naval officer traveling with the two Americans suffered “slight contusions” in the early morning incident.

The vehicle, a Toyota SUV, had diplomatic plates.

Police were engaged in anti-crime operations at the time of the shooting, the statement said.

The Americans and the Mexican officer were traveling on a stretch of unpaved road en route to a navy installation at El Capulin mountain when they encountered “a vehicle whose occupants brandished guns,” the statement said.