Indian police were questioning several people on Tuesday in connection with a bomb attack that killed 10 people in a western city after viewing closed-circuit television footage, officials said.

The bomb exploded on Saturday in a bakery in the city of Pune popular among Western and Indian tourists. It contained ammonium nitrate and RDX, a powerful explosive used by the military, Satyapal Singh, the Pune police chief, told reporters.

"We have got some leads from CCTV footage and we are questioning many people," he said.

Police officers probing the bombing said they were interrogating several Indian Mujahideen (IM) members currently in jail and facing trial.

An unknown fighter group called the Lashkar-e-Taiba Al Alami called the Islamabad office of India's The Hindu newspaper and claimed responsibility for the Pune attack, Indian television channels reported.

Indian police said they had not heard about the group.

Reuters