The boat, the News Agency of Nigeria learnt, was conveying the victims across River Niger for a programme at a traditional wedding ceremony in a community in Niger State.
The boat, conveying about 22 people mostly children, capsized while crossing the river.
A source said that while two of the passengers were rescued, the 19 others drowned and died.
According to him, all efforts to rescue other passengers proved abortive.
“As of yesterday evening, four corpses have been recovered from the river.
“Effort would resume this morning again to ensure that others also are found.
“Both men of the Nigeria Police and the State Fire Service were there yesterday in the rescue mission.
“Unfortunately only two of them survived,” the source told NAN on Sunday.