At least 40 people were feared drowned in the Brahmaputra after a motorised boat reportedly capsized in Kamrup district of Assam on 28 September.
The overloaded vessel was carrying over 300 passengers when it overturned after hitting a wooden bridge in the afternoon, reported the Assam Times.
Several people on board managed to swim to safety. However, about 25 people were reportedly below the deck when the vessel capsized.
A rescue operation led by the State Disaster Response Force (SDRF) is underway, reports said.
The Brahmaputra--one of the India's largest rivers--has been flowing faster than usual because of the heavy rainfall last week.