The state minister for health says they were unharmed by the fire and safely evacuated to other hospitals
Four people are still missing since the mishap took place around 6:30am on Tuesday near Bilmarhia Bazar.
Lalpur police OC Abu Obayed told bdnews24.com that a boat sailed from Bilmarhia terminal with at least 100 people on board and sank because it was carrying passengers beyond its capacity.
He said the identities of the victims could not be confirmed yet.
Local residents and fishermen had started the rescue drive immediately after the capsize. Police and divers of Lalpur and Rajshahi Fire Service took over later.