Hopes for a breakthrough in a push to end Afghanistan’s grueling conflict suffered a major setback today after a key summit between the Taliban and Afghan officials was indefinitely postponed.

A senior government official said in Kabul that talks set to begin in Doha today has been called off for now and details were being reworked.

Meanwhile, Taliban spokesman Zabihullah Mujahid said presence of some participants was completely against the list of what was agreed upon.

The Taliban have repeatedly refused to meet President Ashraf Ghani’s government, which they call a puppet regime but have held several rounds of peace talks with US officials.