Indian police arrested three people on Friday, a day after a powerful bomb accidentally exploded in a border town in the country's east, senior police officers said. A woman and two men were killed in West Bengal's bustling Siliguri town on Thursday, when the bomb went off inside a house due to a faulty timer device. India also tightened security along its border with Nepal to thwart possible attempts by militant groups to sneak into the Himalayan nation, which holds an election next week, officers said. Police believe the three Nepali-speaking people arrested were associates of those killed in Thursday's blast and that the bomb was probably heading towards neighboring Bhutan or Nepal, Rahul Srivastava, a senior police officer said from Siliguri. “The bomb would have killed many people and we are still tracing its connection with the two neighboring countries,” Srivastava said by telephone on Friday. Himalayan Bhutan, which embraced democracy last week, has accused thousands of refugees of ethnic Nepali origin who were expelled or fled Buddhist Bhutan since 1991 of using Indian soil to sneak into Bhutan. The refugees have been living in poor and crowded camps in eastern Nepal, bordering West Bengal, and say they want to go back to Bhutan. A series of small bombings in the run-up to last week's election were blamed on exiled Nepali groups. __
