The missing were identified as Rabbi Havaldar, 20, of Guli Auliyapur, his mother Selina Begum, 40, Khadija, 5, daughter of Dhalu Havaldar of Uttar Rangopaldi area, and Maria Begum, 4, a relative of the groom.
According to police and locals, the trawler carrying 15 people capsized in the middle of the Bura Gouranga river on Friday afternoon.
Mehedi Hasan, officer-in-charge (OC) of Dashmina police station, said four people were still missing from the trawler. Rescue work is going on for the second day as well.