KABUL (ABC News) -- An Afghan security guard opened fire on a group of doctors at a Kabul, Afghanistan, hospital on Thursday, killing three male American doctors and leaving two other people wounded, officials said. A father and son were among the victims, ABC News has learned.
According to Kabul police, a female American nurse was also wounded in the attack.
The victims’ identities were not yet known, but the U.S. Embassy in Kabul confirmed that they are Americans.
The shooting at Cure International Hospital in western Kabul was the latest attack on foreign civilians in Afghanistan's capital this year.
The attacker was a member of the Afghan Police Protection Force assigned to guard the hospital, according to District Police Chief Hafiz Khan. He said the man's motive was not yet clear.
The attacker was wounded and in custody. He was in surgery at midday in the same medical facility under heavy police guard, according to Kanishka Bektash Torkystani, a Ministry of Health spokesman.
"Five doctors had entered the compound of the hospital and were walking toward the building when the guard opened fire on them," Torkystani said. "Three foreign doctors were killed and two other doctors were wounded."
The Associated Press contributed to this report.