A large blast exploded near a Kabul compound on Saturday where Afghanistan's elite will gather later next week to debate a vital security pact with the United States, a Reuters witness and local police said.
The blast was heard soon after 3pm (1030 GMT) in Kabul's west, a Reuters witness at the scene said. A Kabul police spokesman, Hashmat Stanekzai, confirmed the blast and said there were casualties but could not immediately confirm a number.
A witness to the explosion, Mohammad Amin, saw a white Corolla drive.
The blast occurred less than a hundred meters from a huge tent where more than 2,000 prominent Afghans will gather on Thursday to debate a security agreement with the United States.