26 December 2012
Last updated at 00:36 ET
A suicide car bomber has killed at least three people near a US military base in eastern Afghanistan, officials say.
They say the vehicle exploded near the entrance to the Camp Chapman in the city of Khost, killing three Afghans. There were no coalition casualties.
The Taliban later claimed responsibility for the attack.
Khost - like other parts of eastern Afghanistan - has recently seen a dramatic rise in violence.
In October, a suicide bomber killed at least 20 people, three of them Nato soldiers, in the city.
In June, a suicide bomber killed 21 people - including three US troops and a local interpreter.
The Taliban-affiliated Haqqani network regularly mounts large-scale attacks and suicide bombings in the area.
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