Owner of the ferry Syed Ali Bepari, pilot Golabuddin, ticket checker Syed ur Rahman and helper Shah Alam Sheikh were arrested on the charge of plying the ferry after expiry of its licence, Dhubri Additional Superintendent of Police Prashanta Dutta told PTI.
The four were arrested yesterday, he said.
Meanwhile, with search continuing since the mishap, one more body was fished out today, taking the official count of bodies recovered so far to 40.
The body was found from Patakata, downstream from the accident site, and close to Indo-Bangladesh border, Dutta said.
He said the search by the Army, NDRF and BSF would continue.