Qureshi said special judges of tribunal handling Bhagat Singh's case awarded death sentence to him without hearing 450 witnesses of the case.
Singh's lawyers were not given the opportunity of cross-questioning them, he said.
The Lahore High Court has referred the case to the chief justice for constitution of a larger bench to hear the reopening of the Singh's case.
Bhagat Singh was awarded the death sentence for killing Saunders and he was subsequently hanged at Shadman Chowk in Lahore in 1931, aged just 23.
