Police in India's technology hub are searching hotels and questioning people after an intelligence tip-off that the militants who killed 60 people in last weekend's bombings in faraway New Delhi might come to hide there, the police chief said on Thursday. Police in Bangalore - 1,740 kilometers south of New Delhi - began their searches after receiving intelligence that the perpetrators may sneak into the city, said Director General of Police Bhupendra Singh Sial. "Bangalore is a soft spot for terrorists," said Sial, head of the police force in Karnataka state of which Bangalore is the capital. Police in Bangalore increased the number of traffic checkpoints and intensified foot and vehicle patrol. Sial said Bangalore police raised vigilance after the bombings because the city has served as an asylum for criminals in the past. Investigators in New Delhi on Wednesday released sketches of a man suspected of planting a bomb on the bus. The suspect is described as a young man in his twenties, with a thin mustache and wearing a bandage on his left forearm. A little-known Kashmiri group, Islamic Inquilab Mahaz, on Sunday claimed responsibility for the bombings. Nearly a dozen Pakistan-based Islamic rebel groups have been fighting since 1989 for Muslim-majority Kashmir's independence from predominantly Hindu India or its merger with Pakistan. Witnesses said the suspect in the sketch left an explosive-laden bag on the bus before fleeing. Police say they haven't yet established whether the Kashmiri group that claimed credit for the bombings is indeed responsible. However, Indian Prime Minister Manmohan Singh on Monday told Pakistani President Gen. Pervez Musharraf in a telephone call that there were "external linkages" to the attack, and asked Islamabad to crack down on terrorism directed at India from Pakistani soil.