Suicide bomber attacks outside military base in Khost

 KABUL, Afghanistan (CNN) - A suicide bombing in eastern Afghanistan's Khost province killed one civilian and wounded two security guards at the entrance to a military base on Monday, the interior ministry said.

The attack was carried out by a bomber in an explosives-laden car. It followed a roadside bombing in Paktia province Sunday that killed seven civilians, the ministry said.

Monday's attack took place in an old airport by the the Forward Operating Base Chapman - where eight Americans believed to be CIA employees were killed in a suicide bombing in late December.

In that attack, the bomber walked into a gym facility at the base and detonated a suicide vest. It is believed six Americans were wounded in addition to the eight killed.

The airport is used by the United Nations, the military and nongovernmental organizations.