The dead and injured were ferried to Osmania Hospital, Medicity and Yashoda hospital.
Gory scenes were witnessed at the Lumbini Park auditorium with limbs, blood, clothes and shoes of the people watching the laser show strewn around.
Explosive experts visited the sites and collected samples of the materials used in the blast.
After visiting the blast sites, Chief Minister Y S Rajasekhar Reddy told reporters that "it is definitely a terrorist act. It has claimed 30 lives. We are going into details."
He said the government would see to it that efforts were taken to restore peace.
Photograph: Snaps India