A suicide car bomber blew himself up near a convoy of U.S. troops on the outskirts of Kabul on Tuesday, leaving up to seven civilians and three soldiers wounded, officials said. The Taliban claimed responsibility, the Associated Press reported. In the aftermath of the attack, U.S. troops opened fire on police arriving at the scene, killing one policeman, officials and a witness said. The bomber targeted the convoy outside Camp Phoenix, a U.S. base on Jalalabad road _ an area frequently targeted by suicide bomb attacks. A statement from the U.S.-led coalition said three Afghan civilians and three coalition service members were wounded. Lt. Cmdr. Brenda Steele, a spokeswoman for NATO forces, said one foreign soldier suffered minor injuries in the attack and seven civilians were wounded. She would not disclose the nationality of the wounded soldier. The differing casualty figures could not immediately be checked.