The Taliban continued an internal meeting after the American negotiators left the resort in Doha, where the talks have taken place under tight security.

“This round of talks saw extensive and detailed discussions taking place regarding two issues that were agreed upon during January talks,” Zabihullah Mujahid, a spokesman for the Taliban, said in a statement. “Those two issues were the withdrawal of all foreign forces from Afghanistan and preventing anyone from harming others from Afghan soil.”

He added: “Progress was achieved regarding both these issues. For now, both sides will deliberate over the achieved progress, share it with their respective leaderships.”

The sides are expected to meet again later this month in the hopes of finalizing a deal.

But the lack of a clear breakthrough in talks right before spring, when fighting usually intensifies, raises concerns of another bloody year ahead. The war has taken the lives of tens of thousands of Afghan civilians, more than 100,000 Afghan and Taliban fighters combined, more than 2,400 Americans and more than 1,000 forces from other members of the military coalition that invaded Afghanistan almost 18 years ago.

In the negotiations, the Americans have been trying to achieve the United States’ initial goal in the aftermath of the Sept. 11 attacks by Al Qaeda: the prevention of terrorist attacks launched from Afghanistan against the United States and its allies. At the time of the Sept. 11 attacks, Al Qaeda was based in Afghanistan, which was controlled by the Taliban.