Afghan policemen carry the dead body of a victim at a local hospital after a suicide bomb attack in Khost province Dec. 26, 2012. (ANWARULLAH/REUTERS)

A suicide bomb attack near a key U.S. military base in Afghanistan killed three Afghans on Wednesday, according to officials.

At least seven Afghans were wounded in the strike outside Forward Operating Base Chapman, in southeastern Khost province near the border with Pakistan. There were no immediate reports of casualties among foreign troops.

A spokesman for the Taliban, the radical Islamist movement fighting to drive foreign forces out of Afghanistan, claimed responsibility for the attack, in which a suicide bomber drove a vehicle laden with explosives up to the gate of the base.

An Afghan police spokesman said the blast killed a local guard who questioned the driver at the gate, along with two civilians. The bomber also died.

The attack came nearly three years after another suicide bomber attacked FOB Chapman, killing the CIA station chief and six other CIA employees based there, as well as a Jordanian intelligence official.