The Taliban in Afghanistan has suspended talks with the United States over exchanging prisoners and setting up a political office in Qatar.
In a statement, the Taliban said the US kept changing the terms of the negotiations.
The group said US efforts to include the Afghan government in the talks was a stumbling block. The Taliban regard the Kabul government as illegitimate, the BBC reports.
The United States says it remains commited to reconciliation in Afghanistan.
A spokeperson for President Barack Obama says an end to the conflict is unlikely without a political resolution.
Meanwhile, Afghan President Hamid Karzai has called for NATO-led forces to move out of Afghan villages and rural areas after an American soldier killed 16 civilians.
The US soldier accused of the shooting has been flown to a military detention centre in Kuwait.