The US and Afghanistan have long pressed Pakistan to free Baradar and other senior Taliban figures who could be used to tempt moderate Taliban leaders to the negotiating table and transform the insurgency into a political movement.
"In principle, we have agreed to release him. The timing is being discussed. It should be very soon... I think within this month," Sartaj Aziz, Pakistani Prime Minister Nawaz Sharif's adviser on foreign affairs, said yesterday.
Baradar's fate is at the heart of Afghanistan's efforts to kick-start the stalled peace process as most Nato combat troops prepare to pull out of Afghanistan by the end of 2014 and anxiety grows over the country's security.