A woman grieves outside a hospital today where casualties of train explosions are receiving treatment in Bombay, India. Eight explosions ripped through packed commuter trains during rush hour Tuesday in India's commercial capital, killing nearly 190 people and injuring more than 700.

BOMBAY, India — Indian investigators today combed through the twisted and torn wreckage of train cars for clues as to who set off well-coordinated bombings that killed 183 people and wounded more than 700 during the city's evening rush hour.

A senior police official said investigators had some leads and were looking into a possible link with Lashkar-e-Tayyaba, a Kashmiri militant group that earlier today denied any role.

Tuesday's bombings appeared timed to inflict maximum carnage.

The first bomb hit a train at Bandra station at 6:20 p.m. The blasts followed down the line of the Western Railway at or near stations at Khar, Jogeshwari, Mahim, Mira Road, Matunga and finally Borivili, which was struck by two blasts at 6:35 p.m., according to the Star News channel. However, other reports gave different timelines.

Residents overcame their fears and returned to the trains early today. However, there was none of the usual crush on the trains, which serve some 6 million people a day.

"Our trust in Bombay has been shattered, we had always thought trains were safe, but what can we do — in this city trains are the lifeline," said Brijesh Ojha, 35, who boarded a train at Bandra station, where the first blast occurred.

"They can't scare us this way," he said.

Worried residents searched through the night for missing friends and relatives. Dozens of people stood in hospitals, carrying pictures of the missing.

"We have gone to four hospitals, he would have called by now," sobbed Shakuntala Wari who was looking for her 24-year-old son, Vikas, at the Bhabha hospital near Bandra.

She had also visited a morgue. "I'm just very scared what happened to him."