LONDON: The US special envoy for Afghanistan said Friday that an earlier attempt to reconcile with Taliban figures willing to respect a new Afghan constitution would have saved lives and weakened insurgents, hastening the peace process in Afghanistan.

Speaking on Friday in London, James Dobbins said an earlier move might have prevented a Taliban resurgence and would have lessened its force.

''I think we made several mistakes back in 2002,'' he said about the era just after the successful US-led invasion toppled the Taliban in response to the 9/11 attacks on the United States, which were planned by al-Qaeda leaders based inside Afghanistan. ''I think it was probably a mistake to delay a serious attempt at reconciliation until 2011.''

Dobbins, who is the Special Representative for Afghanistan and Pakistan, spoke after talks with Britain's Foreign Office.

He said there should have been an early effort to integrate Taliban members who were ''willing to come over, to operate under the new dispensation, willing to accept the constitution as it was evolving at the time. Those initiatives would have been better if they had been taken earlier.''

The envoy also said the 2003 invasion of Iraq shifted US attention away from Afghanistan at a crucial time, giving the Taliban time to regroup and raises funds.

''The decision to move onto Iraq ultimately made it more difficult to turn attention back to Afghanistan once the situation there deteriorated,'' he said. ''So by 2005, 2006 it was clear that much more needed to be done in Afghanistan and we simply didn't have the resources to do so.''

Despite these setbacks, he said Afghanistan has made progress in recent years. Hopes for peace talks have diminished with the Taliban refusing to talk directly to Afghan President Hamid Karzai, his government or its representatives.

Attempts to open talks between Afghanistan and the Taliban in June ended in failure.