Two workers went missing when a boat capsized in the Piyan River at Nayagangar Par in Goainghat upazila of Sylhet district early today.
The identities of the missing workers could not be known immediately.
Abdul Ahad, officer-in-charge of Goainghat Police Station, said the incident took place around 2:00am when the sand-laden boat carrying 11 workers sank in the river after being hit by another boat due to strong river currents.
Nine workers managed to swim ashore with the help of locals while two other remained missing.
Upon receiving the information, local firefighting units rushed to the spot for rescue operation.