At least four people have been killed by a suicide bomber at a military base in eastern Afghanistan, officials say.
The attacker was reportedly dressed in military uniform, and walked to the main gate of the Bermel military base in Paktika province before detonating the explosives on Saturday.
"Four Afghan soldiers and an Afghan civilian were killed and five civilians were wounded in the suicide blast," said Ghami Khan, a spokesman for the provincial governor.
The military compound is a base for Afghan army soldiers and Nato-led forces in a district close to the border with Pakistan.
Paktika shares a long border with the tribal regions of Pakistan.
Afghan authorities often accuse Pakistan of turning a blind eye to fighters crossing into Afghanistan, allegations that the government in Islamabad have denied.
Meanwhile, the US-led multinational force and Afghan troops claim to have killed several Taliban members in a firefight in Helmand province on Saturday.
A US military statement said: "Afghan national security and coalition forces engaged and killed several Taliban fighters today."