The US envoy negotiating with the Taliban hailed "significant progress" Saturday in finding a solution to end Afghanistan's long-running war.
"Meetings here were more productive than they have been in the past. We made significant progress on vital issues," Zalmay Khalilzad, the US special representative for Afghan reconciliation, tweeted after six days of talks with the Taliban in Qatar.
Taliban officials said US negotiators on Saturday agreed a draft peace deal stipulating the withdrawal of foreign forces from Afghanistan within 18 months of the agreement being signed.
The details were provided to Reuters by Taliban sources at the end of six days of talks with US special peace envoy Zalmay Khalilzad in Qatar aimed at ending the United States' longest war.
They have yet to be confirmed by US officials nor has either side released an official statement. Officials at the US embassy in Kabul were not immediately available for comment.
Khalilzad is heading to the Afghan capital, Kabul, to brief President Ashraf Gani after the longer-than expected talks, the sources and a diplomat said.
According to the Taliban sources, the hardline Islamic group offered assurances that Afghanistan will not be allowed to be used by Al Qaida and Daesh militants to attack the United States and its allies - a key early demand of Washington.
It is not known if a draft is acceptable to both sides has been completed, or when it might take effect.
The Taliban sources said a key provision to the deal included a ceasefire but they had yet to confirm a timeline and will only open talks with Afghan representatives once the ceasefire is implemented.
"In 18 months if the foreign forces are withdrawn and ceasefire is implemented then other aspects of the peace process can be put into action," a Taliban source said, quoting from a portion of the draft.
ALMOST DAILY ATTACKS
Other clauses include a deal over the exchange and release of prisoners from the warring sides, the removal of an international travel ban on several Taliban leaders by the United States and the prospect of an interim Afghan government after the ceasefire is struck, the Taliban sources said.
The offer to appoint an interim government in Afghanistan comes at a time when top politicians including Ghani have filed their nominations for the presidential polls in July this year.
Ghani has repeatedly rejected the offer to agree to the formation of an interim government.
News of progress on a deal comes as the Taliban continue to stage nearly daily attacks against the Western-backed Afghan government and its security forces.
Despite the presence of US-led foreign forces training, advising and assisting their Afghan counterparts 17 years after the US led an invasion to drive them from power, the Taliban controls nearly half of Afghanistan.
The United States has some 14,000 troops in Afghanistan as part of the NATO-led mission, known as Resolute Support, as well as a US counter-terrorism mission directed at groups such as Daesh and Al Qaida.
Despite reports in December last year that the United States was considering pulling out almost half of its forces, a White House spokesman said that US President Donald Trump had not issued orders to withdraw the troops. However, the administration has not denied the reports, which have also prompted fears of a fresh refugee crisis.