Storms in eastern DR Congo killed at least four people, with another 20 others missing, after a river in spate swept away a building, officials said.

The accident happened in the rural and mining territory of Mwenga, where local people had sheltered under a hangar serving as a makeshift restaurant on the banks of the river.

The rain triggered a landslide, causing the building to collapse, Alexandre Ngandu, the deputy mayor of Kamituga, a major town in the eastern South Kivu region, told AFP.

"The river carried everything away… The toll is 20 missing and four bodies recovered."