WRAPUP 2-U.S. says civilians killed in west Afghan strikes

* U.S. military admits air strikes killed civilians

* Karzai says up to 130 dead in west Afghanistan

* Taliban 'may have used human shields'

(Adds Karzai's estimate of civilian death toll)

By Emma Graham-Harrison

KABUL, May 9 (Reuters) - The U.S. military acknowledged on Saturday that air strikes in western Afghanistan this week had killed civilians and Afghan President Hamid Karzai put the death toll at up to 130.

In a joint statement with the Afghan government, U.S. forces said non-combatants were among the dead but it was not possible to determine how many because the bodies had been buried.

Karzai said he had received an official update putting the number of innocent casualties from the strikes, which hit crowded homes in two villages in Farah province, as high as 130.

If that toll was confirmed it would be the deadliest single incident affecting Afghan civilians since U.S.-led forces started battling the Taliban in 2001.