"We have already gathered vital clues in the case. We are confident we will crack the case soon," state Home Minister P Sabita Indra Reddy said after a high-level review meeting chaired by Chief Minister N Kiran Kumar Reddy.
Thurday's serial blasts left 16 dead and over 117 injured.
The modus operandi adopted by the perpetrators like ammonium nitrate and splinters-laden aluminium containers fitted to bicycles used in the blasts pointed the needle of suspicion towards Indian Mujahideen.
Director General of National Investigation Agency S C Sinha discussed with state police officials the ongoing investigation.
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Amid reports that some CCTV cameras at the blast sites were not functioning, the state home minister said 3500 closed-circuit cameras would be installed at vital locations under Hyderabad and Cyberabad police commissionerates to improve vigil.
Meanwhile, Abdul Wasey Mirza, a 23-year-old unemployed youth who fell victim to terror attack for a second time on Thursday in the Dilsukhnagar blasts, has been questioned by police which clarified he is not being treated as a suspect.