A senior U.S. official says preliminary reports from the scene indicate that one person is dead after a car with two people inside tried to ram a gate at the base.

The official says a firefight ensued after the car tried to crash the gate, and at least one of the two people in the car is dead.

The official spoke on condition of anonymity because they were not authorized to discuss an ongoing incident.

Sources confirm to CBS News that after the vehicle tried to run through the gate, guards responded by shooting at the vehicle and at least one individual was shot.