The trial against the four accused - Anique Shafiq Syed, Mohammed Sadiq, Akbar Ismail Choudhary and Ansar Ahmed Badhsah Sheikh - was moved to a courtroom inside Cherlapalli Central Prison in Hyderabad from a courtroom at Nampally court complex in June.
The counter-intelligence wing of Telangana Police had filed three chargesheets against the four men.
In August 2013, the second Metropolitan Sessions Judge's court framed the charges against the "IM" operatives.
They were charged under Section 302 (murder) and other relevant provisions of the IPC and sections of the Explosive Substances Act in connection with the blasts on August 25, 2007, and also with regard to an unexploded bomb found under a foot-over bridge in Dilsuknagar.
Nearly 170 witnesses were examined and cross-examined during the trial.
The blast at a popular eatery, Gokul Chat, killed 32 people, while 10 more died at the open-air theatre at Lumbini Park, a few metres from the state secretariat.
More than 50 people were injured in the near-simultaneous blasts.
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