A suicide bomber has blown himself up in southern Afghanistan, killing one Afghan intelligence service officer and injuring three others.
Lutfullah Mashal, a spokesman for the Afghan intelligence service, said the officers, acting on suspicions, stopped a car in the Spin Boldak district of Kandahar province.
A gun battle broke out between the intelligence officers and two suicide bombers inside the car.
One bomber was killed in the car, Mr Mashal said, and the other, who was injured, got out of the vehicle, fell to the ground and acted as if he was dead.
When the intelligence officers walked towards him, he detonated his vest full of explosives.
In recent months, the Taliban have stepped up attacks on individuals aligned with the Afghan government and coalition forces.