A powerful bomb exploded on a crowded commuter train Thursday night in Bombay, India's financial capital, killing at least 11 people and wounding more than 60, officials said.

The bomb went off when the local train, packed with office workers returning to their homes, was pulling into the suburban Mulund station northeast of the city. Television images from the scene showed that the entire roof of the coach had been blown off. Rescue teams worked to pull survivors from the debris.

"The blast took place at 8:45 p.m. as the train left [Victoria Terminus] station. It is usually a very busy time, and the trains are particularly crowded," Kirit Somaiya, a member of Parliament from Bombay, said this morning in a telephone interview from the site of the blast. "Women have been targeted particularly, as the bomb blast has taken place near the ladies' compartment of the train."

No one claimed responsibility for the attack, which occurred one day after the 10th anniversary of serial bomb blasts in Bombay that killed about 250 people. The 1993 bombings were blamed on Muslim militants retaliating for the destruction of a mosque by Hindus the previous year in the northern city of Ayodhya.

A senior Bombay police official said on Indian television that Thursday's blast looked like the work of a terrorist group and said investigations were underway. A red alert was announced in the city, and security was also tightened around important public buildings here in the Indian capital.

The attack was the latest and deadliest of several bomb attacks around Bombay. In December, an explosion on a bus killed two people and wounded 31, and a blast several days later in a food court injured 23. In January, a bomb exploded in a crowded suburban street, injuring 30 people.

Police say investigations into the previous blasts led them to suspect members of a banned Muslim group, the Students' Islamic Movement of India.