Two United States diplomats were killed and one was wounded when their car was ambushed by a gunman as they drove to the U.S. consulate in Karachi this morning, police said.
The motive for the attack was not clear and U.S. Embassy officials in Islamabad would not comment immediately on the shooting.
The names of the two Americans killed were not immediately available.
The injured man was vice consul Michael Owens, police said.
The three Americans and their Pakistani driver were waiting at a traffic light when a gunman opened fire on the vehicle with an automatic rifle.
The driver was not injured in the attack, police said.