The Andhra Pradesh government on Monday entrusted  investigations into the May 18 bomb blast at the historic Mecca Masjid, in which nine people were killed, to the Central Bureau of Investigation (CBI).
The blast had taken place during Friday prayers at the 17th century mosque near Charminar, the symbol of Hyderabad.
A team of CBI officials is likely to arrive here in a day or two to formally take charge.
On May 24, Chief Minister Y.S. Rajasekhara Reddy had ordered a CBI inquiry into the blast, following a demand from the Muslim community.
The Special Investigation Unit formed by the city police to probe the blast failed to make any progress. Police suspect involvement of terrorist outfits in the blast, but they have so far failed to identify the culprits.
Shoaib Jagirdar, a meat shop owner from Jalna in Maharashtra, was arrested by Hyderabad police, but no evidence could be found against him.
He, was however booked under the Passport Act for attempting to obtain a fake passport for one Sameer alias Nayeem, a suspected operative of Lashkar-e-Toiba.
Last week, Sameer was brought to Hyderabad from Mumbai for questioning in connection with the blast.
Probes into firing
Meanwhile, the state human rights commission and a magistrate on Monday began separate probes into the police firing on angry mobs in the aftermath of the blast, in which five people were killed.
On May 19, the government had ordered a magisterial inquiry into the blast a judicial probe on May 24.
Special Executive Magistrate Ramesh Reddy, who began the magisterial inquiry Monday, directed police to submit all records and autopsy reports.
The state human rights commission began a probe into the police firing on a complaint by Majlis-e-Ittehadul Muslimeen (MIM), the powerful Muslim political party.
MIM leader and Hyderabad MP Asaduddin Owaisi alleged that police firing on the protesters was “unprovoked.”
Mr Owaisi claimed that the police had opened fire without using alternate methods to disperse the protesters.