MUMBAI, July 14: India broadened its search for the Mumbai bombers with police tracing calls made to Pakistan and Bangladesh as Prime Minister Manmohan Singh arrived in India’s biggest city on Friday to meet people wounded in the attacks.

Police continued raids in Mumbai and surrounding areas, a day after India named Lashkar-i-Taiba militant group as the prime suspect behind Tuesday’s rail network bombings that killed 200 people and wounded hundreds more.

Investigators said there were looking at international calls made from phone booths immediately after the blasts.

The Times of India newspaper said authorities were probing a call from Mumbai to Karachi where the caller told his mother he was fine but could not reveal his location or talk at length and then hung up.

Police detained a young man, dressed as a burqa-clad woman, late on Thursday night at the city’s international airport, besides the 20 people already held.

“We have detained a man moving about suspiciously at the international terminal. He has been changing his statements,” Chandrahans Chauhan, a police investigator, told Reuters.

“He also claimed that he is a pilot.”

Investigators have also made sketches of three suspects seen at sites of the attacks, which hit crowded railway carriages and stations in the nation’s financial hub during evening rush-hour.

Pakistan said on Thursday it was ready to help India in its investigation.

But India’s junior foreign minister told Reuters on Thursday that Pakistan was not doing enough to control Islamist militant groups on its soil which launch attacks on India.