The arrestees were identified as Doyal Krishno, 40, son of Gopal Krishno, hailing from Sitakundo, and Md Hossain, 45, son of Md Ali, hailing from Teknaf, reports United News of Bangladesh.
Dickson Chowdhury of Coast Guard (East zone) said on secret information, a team of the force conducted a drive in Gohira coastal area of the upazila on Monday midnight and arrested the duo along with 50,000 pieces of Yaba tablet.
Based on information from them, the team conducted another drive in Parki beach area and challenged a boat early in the morning.
Sensing danger, the passengers fled leaving the boat behind.
Later, the coast guards seized 9.50 lakh Yaba pills from the boat.
The seized tablets will be worth around Tk 50 crore.