SUNA said the small boat was overloaded, carrying about 30 sacks of sweet potatoes and 10 bags of grain in addition to the children and the woman, an employee at a local hospital. Villagers in the region rely on wooden boats to cross the Nile.
Another witness told AFP by telephone that the boat had been crossing the river against the current.
“All the families (in the area) are in mourning,” said the witness, who did not want to be named.
In the deadliest Nile accident of its kind in Sudan, 50 students drowned in August 2000 when their wooden barge overturned 350 kilometres southeast of Khartoum.
Water levels in the Nile rise every year during the rainy season in Ethiopia, and United Nations aid agencies regularly warn of floods in Sudan between July and November.