The magisterial court extended Hamza's police custody after the Special Cell of Delhi Police said the disclosures made by Maqbool, arrested on October 23, have necessitated their confrontation.
Two other accused in the case, Asad Khan and Imran Khan, however, were sent to 14-day judicial custody as the Special Cell said they were no longer needed for interrogation.
A fourth accused, Irfan Mustafa Langda, is already in police custody till October 30.
The police claimed Maqbool in collusion with Asad, Imran, Feroz and Mustafa had planned to commit fidayeen attacks on Buddhist shrines in Bodh Gaya in Bihar.
Police had said they had got the approval of IM chief Riyaz Bhatkal, a fugitive believed to be holed up in Pakistan, for carrying out the attack as a "retaliation to the alleged atrocities on Muslims in Myanmar."
Sayed Maqbool, who, police claimed, is a district president of All India Majlis Itehad-ul Muslimeen which has an MP in Lok Sabha, was apprehended from Hyderabad.
Maqbool, a fruit seller who allegedly taught suspected IM terrorists on how to make IEDs, is the fifth person to be arrested in connection with the August 1 Pune blasts to avenge the death of alleged IM module Qateel Siddique in Yerwada Jail.
Asad, who is alleged to be a "recruiter, motivator and IM ideologue" and Imran were arrested on September 26 from their hideout in Pul Prehladpur in South Delhi, while Feroze was apprehended from Nizamuddin Railway station on October 1. This was followed by arrest of Irfan.
Asad, Imran and Feroze were arrested by the Delhi Police for planning strikes in the capital during the Dussehra and Diwali festivals. The police claims that preliminary inquiries have revealed that they were involved in the Pune blast.
