NATO defence ministers have agreed the military alliance must now begin planning for a complete withdrawal from Afghanistan this year despite wanting to maintain a troop presence there.
With Afghan President Hamid Karzai refusing to sign a security pact with Washington to allow US troops to stay after 2014, there was no prospect NATO could reach such an accord either, alliance head Anders Fogh Rasmussen said on Thursday.
"Without the necessary legal framework, there simply cannot be a deployment after 2014," Rasmussen said.
"So today, we agreed the need to plan for all possible outcomes. Including the possibility that we may not be able to deploy to Afghanistan after 2014, due to the persistent delays we have seen," he said.
Rasmussen said for NATO, this "is not the outcome we want. It is not the outcome that we think is in the interest of the Afghan people.
"However, it might be the unfortunate outcome if there is no security agreement in due time. This is what is at stake."
Earlier this week, US President Barack Obama talked by phone to Karzai over his repeated refusal to sign the Bilateral Security Agreement (BSA) with Washington.
The BSA lays deal the legal basis for a continued US and NATO troop presence in the form of a training mission post-2014.
It is expected to number up to 12,000 troops, mostly American, and is seen as an important guarantee of continued US and NATO support during a difficult transition period.
In 2011, Washington withdrew all its forces from Iraq in a 'zero option' when it could not secure an agreement with Baghdad and there are fears a similar outcome in Afghanistan could leave the way clear for the Taliban to return to power.
