The family has pleaded that the IHC order Samar's release at the earliest, ensure his safety, and ensure that he is not tortured by his abductors.
Samar was reported missing from the federal capital since January 7, 2016.
Samar's family had lodged an application with the Ramna police station on Jan 14, and an FIR was registered on Jan 15.
An activist based in Karachi who belongs to various forums that have been raising their voice against atrocities committed against minority groups in the country, Samar is also president of the Civil Progressive Alliance Pakistan (CPAP).
According to CPAP General Secretary Syed Talib Abbas, Samar had travelled to Islamabad from Karachi on business. “He was continuously in touch with his family, but on Saturday (Jan 7), his mobile phone was switched off. The family has not heard from him since,” he said.
He said Samar, 40, is married and has two children; a boy and a girl.