In October last year, a Metropolitan Magistrate had handed over the five accused to the Gujarat police after it moved an application to take them to Ahmedabad to probe their role in the July 26 blasts there, which claimed 56 lives.

Serial blasts at Karol Bagh, Connaught Place and Greater Kailash-I on September 13 had claimed 26 lives.

According to the chargesheet filed by police, the phone records revealed that Saif had played a key role the Greater Kailash market blast. Saif and another accused Junaid went to the Cycle Market in Chandni Chowk and bought 20,000 ball-bearings after pretending as engineering students.

The Delhi Police arrested Saif and Zeeshan on September 19 after the Batla House encounter; the other three were arrested the following day from Shaheen Bagh in Okhla.