Department of Narcotics Control Directorate (DNCD) arrested two drug traders and seized 6.8 lakh pieces yaba tablets from the outer anchorage of Chittagong port on Wednesday morning.Tapan Kanti Sharma, zonal inspector of DNCD said the anti-narcotics officials seized 6,80,000 yaba tablets just before unloading from the fishing trawler near outer-anchorage of the port area.The DNCD officials also nabbed five suspected persons and after primary investigation, three persons got released as they were found connection with in this connection.He said the haul of 6,80,000 yaba tablets were collected from Myanmar and brought to Chittagong from Teknaf upazila of Cox`s Bazar through river route.The arrested were identified as the boatman Faridul Alam, 42, and his assistant Abul Kalam, 33.The fishing boat was detained in this connection.The main culprit behind the haul will be identified after investigation, Sharma added.