The cause and extent of casualties, if any, were not immediately known.
Bomb attacks targeting foreign troops and Afghan government officials and security forces have intensified as the international military coalition draws down, leaving the fight against the Taliban insurgency mostly to Afghan forces.
Tuesday’s explosion was in the Pul-e-Charkhi district in eastern Kabul, but there were no initial reports on casualties, said Hashmat Stanekzai, spokesman for Kabul’s police chief.
The blast was large enough to rattle windows several kilometres away in Kabul’s central diplomatic district. (Reuters)