Two bomb blasts killed at least 12 people and wounded 57 others on Thursday in the southern Indian city of Hyderabad, Home Secretary R.K. Singh said.

Hyderabad's police commissioner Anurag Sharma didn't rule out the possibility of terror involvement in the city blasts. But he refused to identity any group as a suspect.

Prime Minister Manmohan Singh called the strike a "dastardly attack" and said "the guilty will not go unpunished." He directed government agencies to extend all possible relief to authorities in Andhra Pradesh state. He also approved money for the next of kin of those killed and for others seriously injured.