Guwahati, Dec 7 (ANI): Assam police arrested a key suspect behind a blast in West Bengal who is also believed to have been involved in a plot to assassinate Prime Minister of Bangladesh Sheikh Hasina and stage a coup there. Shahnor Alom, who was arrested in a village in Assam, is an operative of a banned Bangladeshi group active in West Bengal, a senior intelligence officer said. According to a police officer, he was caught hiding in his relative's house in a village in Nalbari district of Assam. Director General of Police for Assam, Khagen Sharma, said Alom had a very good rapport with militant leaders from both West Bengal and Bangladesh.