A fatal car-bomb blast has struck the Afghan capital, Kabul, the second deadly explosion in the city in two days.
At least seven people were reported killed or injured in the May 31 explosion in the Yakatot area of eastern Kabul.
The bomb exploded as a U.S. military convoy passed through the area.
A spokesman for the U.S. military said four U.S. service personnel were slightly injured in the incident.
Interior Ministry spokesman Nasrat Rahimi was quoted by AFP as saying four Afghan passersby had been killed and three were wounded.
Officials cautioned that the exact number of dead and wounded remains unknown.
Taliban spokesman Zabihullah Mujahid claimed responsibility for the blast, claiming without evidence that 10 U.S. soldiers had been killed.
U.S. and NATO military forces, as well as the Afghan National Security Forces, maintain facilities in the area near the explosion.
On May 30, six people were killed when a suicide bomber struck near an Afghan Army academy a few kilometers away from the scene of the May 31 blast.
The Islamic State (IS) extremist organization claimed responsibility for the May 30 attack.
Car Bomb Rocks Afghan Capital