A ferry carrying more than 1,000 passengers has partly capsized in southern Bangladesh, police say.
The accident happened as the MV Coco-4 was approaching a river station near the town of Lalmohan on Bhola Island, a local police chief said.
The ferry was crowded and the weight of disembarking passengers caused it to tip and partially sink, reports said.
At least 10 people are reported to have died and police say they fear some passengers may be trapped on the boat.
Divers searched for bodies on the lower deck of the triple-decked vessel, the emergency services said.
A rescue ship was called in to salvage the sunken ferry.
"So far we have rescued more than 50 people alive by cutting open lower cabins. They have been shifted to a local hospital, with the conditions of seven very critical.
"Scores are still trapped underwater," police inspector Nazrul Islam told AFP news agency.
Many of the passengers were travelling home from Dhaka to celebrate the Muslim festival of Eid al-Adha.
The MV Coco-4 is one of Bangladesh's largest inland vessels.
Ferry accidents occur frequently in Bangladesh - typically blamed on unsafe, ageing boats and overcrowding.
File photo of a boat on water near Bhola. A ferry has sunk in Bangladesh earlier today, killing at least five people, according to authorities. About fifty more people were missing after the incident.

Police said that the accident occurred as the vessel, called the ''MV Coco-4'', came near a river station at Bhola Island, located 300 kilometres from the Bangladesh capital of Dhaka. The ferry was reportedly overcrowded, and the boat tipped to one side as all its passengers moved to disembark.

"It was overcrowded with over 1,000 passengers. It tilted and part of it sank due to crowd pressure as it arrived near the Nazirpur river station," said a local police chief, Zakir Hossain, to the Agence France-Presse news agency. He also added that "many passengers have managed to land safely. But we believe some others who were staying in the cabins were trapped under water. We are trying to rescue them," Rescue teams and divers are reportedly searching underwater for bodies.

Ferry accidents are not infrequent in the country; incidents have usually been due to overcrowding, or the use of old vessels. "At festival time it is really difficult to stop passengers and relevant ferry operators from flouting rules," said an officer for the Bangladesh water authority.