At least four NATO servicemen were killed in an attack in eastern Afghanistan on Tuesday, the International Security Assistance Force said.
Earlier, Ziaul Rahman Sayedkhili, a senior police officer in the eastern province of Parwan, said the death toll included six NATO soldiers, 10 Afghan civilians and two Afghan policemen.
"Two days ago a rocket was fired from the village of Qalandar Khil which hit the Bagram (military) base and this morning a joint Afghan-ISAF operation went there to investigate the case," he said.
"There was a suicide bomber on a bicycle who detonated his explosives which killed 10 local civilians, two policemen and six ISAF soldiers."
ISAF said in a separate statement four of its servicemen were killed.
The Taliban claimed responsibility for the attack in a text message to Reuters.
The attack took place amid deteriorating security in Afghanistan as most ISAF forces prepare to leave the country after 12 years of war against Taliban insurgents.