Police impose curfew in Jaipur as investigation in bomb blast

NEW DELHI, India (CNN) - Police imposed a curfew in Jaipur Wednesday, a day after near-simultaneous bomb attacks in the ancient Indian city killed at least 63 people and wounded more than 200.

Vasundhara Raje, chief minister of Rajasthan - the state of which Jaipur is the capital - blamed an "unnamed international terror group" for the attack, but said it was too early in the investigation to specify which one.

H.G. Ragavendhra, Jaipur's superintendent of police, told CNN that police found nine newly-purchased bicycles at the scene that they think were used to carry the explosives. The owner of the bike shop is helping police draw a sketch of the person who purchased the bicycles.

Police have also picked up six suspects and were questioning them.

The day-long curfew, authorities said, was meant to prevent "communal violence." Jaipur, known as the "pink city" for its rose-colored forts and palaces, is a popular tourist attraction. The majority Hindu city of 2.7 million people has a sizable Muslim population.

The curfew was intended to prevent large crowds from gathering at the blast site and hampering the investigation, said Jaipur police director Kanhaiya Lal. Also, tempers could flare as mourners spend the day carrying bodies to their home villages and to crematoriums, he said.

CNN's sister network, CNN-IBN, and the Press Trust of India said home ministry officials suspect the Islamic militant group Harkat-ul-Jihad al-Islami (HuJi) of being behind the attacks. No one has claimed responsibility.