A suicide car bomber has detonated explosives near a U.S.-run military base in eastern Afghanistan. Security officials say at least three people were killed.

Afghan officials say the attack occurred on Wednesday near a military facility and airport in Khost, a volatile city near the Pakistani border.

The Taliban claimed responsibility for the bombing, which also left several people wounded.

The attack comes two days after a female Afghan police officer shot and killed an American adviser in Kabul, an incident that once gain raised concerns about the ability of Afghan authorities to manage security after most foreign troops pull out in 2014.

Afghan authorities said the female shooter is an Iranian national, but there was no initial evidence that she had ties to militant groups.