Kabul  - A civilian military aircraft working with international forces and a US helicopter crashed in Afghanistan on Sunday, while a NATO soldier and 35 Taliban militants were killed in volatile southern region, officials said.

The civilian helicopter, which was working for the international forces in southern Afghanistan crashed during the take-off from Kandahar province's airfield on Sunday, NATO said in a statement.

"The number of injuries has yet to be confirmed. Emergency personnel are on the scene," the statement said, adding, "There was no indication of the cause of the accident but insurgent action has been ruled out."

Meanwhile, A US military helicopter made an "emergency landing" near a military base in eastern Konar province on Sunday morning, the US military said in a statement.

"Personnel on the aircraft were initially treated on site and evacuated to the nearest medical facility for further treatment," the statement said, but did not say that how many people aboard the chopper were hurt.

The incident came a day after a US fighter jet F-15E crashed in eastern Afghanistan, killing both its crew members.

Six civilian Ukrainians were killed in another crash in southern Helmand province on last Tuesday when their helicopter went down near a British military base in the province. Taliban said their fighters had downed the chopper.

Southern region has been the main hub for Taliban insurgents since the ouster of their regime in a US military invasion in late 2001. Thousands of US, British and Afghan soldiers are taking parts in major assaults against the militants in the region since late last month.

In the latest incident in the region, a NATO-led soldier was killed in a roadside bomb blast in the region on Saturday, the military alliance said in a statement on Sunday. It did not reveal the nationality of the soldier.

Afghan defence ministry also said Sunday that its troops backed by international forces killed 35 Taliban militants in an operation in Shah Walikot district of Kandahar province on Saturday.

The combined forces seized a large cache of weapons and explosive materials during the operation, it said. (dpa)