Afghan security officials have reportedly claimed that the blast was caused by a suicide bomber detonating a vehicle-borne improvised explosive device (VBIED), and the NATO-led Resolute Support mission has said that an IED was the cause of the explosion.
The NATO mission also reportedly said it believed the attack targeted an Afghan army vehicle. The police officers were escorting the convoy at the time of the attack, the media reported.
None of the US personnel is said to have been injured in the attack.
No extremist group has claimed responsibility for the attack so far.
Afghanistan is experiencing significant political, social and security-related instability, as radical extremist organizations, including Taliban, continue to stage attacks against civilian, army and state targets.
