Several survivors said that there saw nearly 200 people on board.
Around 23 bodies have been recovered and 40 people rescued following a boat accident on Lake Kivu, Colonel Molatelo Motau of the Southern African Development Community (SADC) mission in Democratic Republic of Congo said on Thursday.
A video seen by Reuters appeared to show the two-deck boat tilting sideways before capsizing in calm waters. Reuters was not immediately able to verify the video.
A local migration authority said that around 45 males and 35 females were registered as passengers, adding that those figures were not definitive and ages were unavailable.
Several survivors told Reuters that there saw nearly 200 people on board.