Afghan officials say a suicide car bomber has attacked a convoy of foreign troops in the capital, Kabul, killing at least 13 NATO service members.

U.S. military officials say all 13 were Americans.

The Taliban has claimed responsibility for the attack.

In a separate incident Saturday in southern Afghanistan, NATO says two service members were killed when an individual wearing an Afghan National Army uniform turned his weapon on Afghan and coalition forces.

The international alliance says the shooter was killed in the incident.

Meanwhile, authorities say a female suicide bomber in eastern Afghanistan blew herself up outside the local branch of Afghanistan's spy agency.

Officials say the woman targeted the National Directorate of Security in Asadabad in Kunar province Saturday.

The French news agency says two guards were wounded in the attack.