Afghan officials said Thursday that a deadly U.S.-led special forces raid on a remote western village last week was based on misleading information provided by a rival clan.

It was the latest twist in a tangled debate over what happened. U.N. officials say the raid killed up to 90 civilians, most of them children. A NATO official said U.S. and Afghan troops were fired on first, touching off a battle of several hours that killed 25 militants and five civilians.

The U.S. government is pressing for a joint U.S.-Afghan probe in hopes of reaching a common conclusion. Two Pentagon officials said Thursday a U.S. review concluded civilian deaths were far fewer than claimed by others. The officials, who spoke on condition of anonymity because the report had not been made public, said the findings were given to Afghan leaders.

Evidence from all sides has been scant, with no conclusive photos or video emerging to shed light on what happened in Azizabad on Aug. 22. But the claim of high civilian casualties, also made by Afghan officials, is causing new friction between President Hamid Karzai and his Western backers.

Karzai has castigated Western commanders over civilian deaths from military operations, saying they create anger among Afghans that the Taliban and other insurgents use as leverage to turn Afghans away from the government.

Claims of civilian deaths can be tricky, however. Relatives of Afghan victims are given condolence payments by Karzai''s government and U.S. military, providing an incentive to make false claims.