In comments given to the New York Times and confirmed to CNN by the US Embassy in Kabul, Zalmay Khalilzad said the framework for peace would see the insurgent group vow to prevent the country from being used as a hub for terrorism in return for a US military withdrawal.

"We have a draft of the framework that has to be fleshed out before it becomes an agreement," Khalilzad told the Times on Monday. "The Taliban have committed, to our satisfaction, to do what is necessary that would prevent Afghanistan from ever becoming a platform for international terrorist groups or individuals."

The peace negotiations in Doha, Qatar had previously been described on Saturday by Khalilzad as "more productive than they have been in the past," signaling the first significant shift in the geopolitical stalemate in years. But he added that "nothing is agreed until everything is agreed."