US Secretary of State Mike Pompeo says there has been a "pretty important breakthrough" in peace talks with the Taliban in recent days.
Defence Secretary Mark Esper earlier said they had "negotiated a proposal" for a week-long reduction in violence.
The two sides have long been engaged in negotiations aimed at ending the 18-year war in Afghanistan.
But they have been fraught with challenges. President Donald Trump declared the talks "dead" in September.
