Dhaka, Feb. 12 -- It came after a trawler carrying Rohingya refugees sank in the Bay of Bengal on Tuesday, leaving at least 15 people dead and dozens of others missing.The case was filed by MS Islam, an officer of the Coast Guard Contingent on St Martin's Island, on Tuesday and it implicates several other unidentified suspects, according to Teknaf Police OC Pradip Kumar Das.Police have so far detained eight 'agents', including four survivors of the disaster near St Martin's Island, according to OC Pradip."Four named suspects in the case were arrested during drives in various parts of Teknaf since Tuesday night. Prior to that, we arrested four others who were rescued from the Bay. Among them, two are members of the Rohingya community and s...