The Taliban broke off talks with the Afghan government on a prisoner exchange on Tuesday.
The peace talks were being brokered by the United States after it agreed on a troop withdrawal pact with the militants.
The Taliban maintain they would not participate in “fruitless meetings” and the release of their prisoners was being “delayed under one pretext or another”.
The recent pact between the United States and the Taliban, under which US-led international forces will withdraw in exchange for Taliban security guarantees, was possible at the end of the 18-year war. But peace hinges on talks between the US-backed Afghan government and the militants. A prisoner exchange is meant to build confidence on both sides for those talks.
“We ask the Taliban to not sabotage the process by making excuses now,” said Javid Faisal, a spokesman for the National Security Council in Kabul.
The Taliban suspension of the talks could lead to an escalation of violence, which in turn could threaten the plan to withdraw US troops, a major objective of President Donald Trump.
A three-member Taliban team arrived in Kabul last month from Qatar to begin the prisoner exchange process. Last week, Afghan officials said they would release 100 Taliban prisoners who were sick or over the age of 50.
In exchange, the Taliban were expected to free 20 members of the Afghan security forces. Ultimately both sides would aim to release the 6,000 prisoners they are holding.