The governor of northeastern Kunar province said villagers were claiming that airstrikes had killed dozens of civilians, though he said he could not confirm the report.

But Afghan police said Saturday 25 civilians were killed in air raids in northeastern Afghanistan, including a strike on a funeral, but the Nato-led force rejected the toll.

Residents of a remote area of the northeastern province of Kunar said Friday that around 30 civilians were killed in the strikes on Thursday and Friday but Afghan authorities refused to comment.

In the first official confirmation of the toll, Kunar province deputy police chief Abdul Sabur Alayar told AFP 25 civilians were killed as were 20 "enemies."

The fighting in the south, west and northeast continues a trend of sharply rising bloodshed the last five weeks, among the deadliest periods here since the 2001 US-led invasion.

More than 1,000 people were killed in insurgency-related violence in June alone, including 700 militants and 200 civilians. More than 3,100 people have been killed in Afghanistan this year, according to an Associated Press count based on information from Western and Afghan officials. Around 4,000 people died in violence last year.

US-led coalition and Nato spokesmen on Friday emphasized that ground commanders had evaluated the terrain to prevent civilians casualties, though Kunar Gov Shalizai Dedar said villagers had reported that 10 civilians were killed in an initial airstrike, and that a second strike killed about 30 people who were trying to bury the dead.

Dedar said he could not confirm the reports of civilian deaths but that he was not rejecting their validity either. He said around 60 militants died in the battle.

US and Nato officials say Taliban militants threaten villagers into claiming that attacks killed civilians.

"There were some number of insurgents that were killed. We have no reason to believe that any civilians were killed at this time," said Nato spokesman Maj. John Thomas. He said soldiers called in airstrikes on "positively identified enemy firing positions" in a remote area.

Civilian deaths have been a growing problem for international forces here, threatening to derail support for the Western mission. President Hamid Karzai has repeatedly implored forces to take care to prevent such deaths.

Both a UN and the AP count of civilian deaths this year show that US and Nato forces have caused more civilian deaths this year than Taliban fighters have.

Meanwhile, a roadside blast struck a Nato convoy in southern Afghanistan, wounding four alliance soldiers Saturday.

The Nato convoy was attacked west of Kandahar city, and the four wounded soldiers were medically evacuated to a nearby military hospital, said Maj. John Thomas, a Nato spokesman.

Qari Yousef Ahmadi, a purported Taliban spokesman, said that the convoy was struck by a suicide bomber.

An AP reporter at the site of the blast said that those wounded were Canadian soldiers.

In the country's east, two Nato soldiers died and several others were wounded during an operation Thursday, the alliance said.

The alliance did not release the soldiers' nationalities or the location where the clash and the bombing took place. Most foreign troops in the east are American.