A suicide bombing attack wounded six people Friday near Camp Phoenix, a logistics support base for U.S. forces just outside Kabul, an Afghan police official said.
NATO said the suicide bombing occurred at 8 a.m. (0330 GMT).
Abdul Ghafar Sayed Zada, chief of criminal investigation for Kabul police, said three civilians and three foreigners were injured in the attack.
Nabi, a taxi driver, told The Associated Press at the scene that he was driving down the road when he heard a "big bang."
"Everything went dark," said Nabi, who like many Afghans uses one name. "I just managed to take myself out of the area. I don't know what happened then, but the attack was on the foreigners."