Published: Apr 24, 2014 5:16 AM EDT
Updated: Apr 24, 2014 6:02 AM EDT

KABUL, Afghanistan (AP) - The U.S. Embassy in Kabul says the three hospital staff killed today when an Afghan guard opened fire are American doctors.
    
Police in Afghanistan say the security guard was assigned to guard Cure Hospital in the west of Kabul, when this morning he pulled out his gun and suddenly started shooting.
    
Another person was wounded.