At least one person has been killed in a suicide bomb attack outside a Nato base in Khost province in south-eastern Afghanistan, police say.
The bomb targeted the same base where seven CIA agents were killed last year in one of the worst attacks against US intelligence officials.
Police said a car packed with explosives was detonated in front of the base, killing one civilian.
Meanwhile on Sunday, eight people died in a roadside blast in Paktia province.
Fourteen others were injured when a bomb hit a passenger van, Afghanistan's interior ministry said.
In Decmber 2009, a deadly attack by a suicide bomber who infiltrated the base in Khost killed seven CIA agents and a Jordanian officer.
Forward Operating Base Chapman, a former Soviet military base, is used not only by the CIA but also by provincial reconstruction teams, which include both soldiers and civilians.