Three people went missing while crossing the River Teesta at village Dhubni of Hatibandha upazila in Lalmonirhat on Sunday morning.
The victims are — Fazlul Haque, 59, Ahidul, 50, and Shafikul, 45, all residents of village Dakshin Gardimari of the upazila.
Witnesses said that a boat carrying some 10 farmers was crossing the river at about 8:30am.
The boat sank due to the heavy tides in the river at the west end of Hajir Mor in Dhubni area, under Singimari union of the upazila, they said, adding that all the farmers except the trio managed to swim ashore.
Shah Alam, officer-in-charge of Hatibandha Police Station, confirmed the incident saying that efforts are on to rescue the missing people.