At least six people were killed when an artisanal diamond mine in Democratic Republic of Congo's Kasai province caved in, a provincial official said on Thursday, adding that there could be more victims.
Artisanal mines are usually dug by hand, often in dangerous conditions. Fatal accidents are common.
Luc Pongo Mwamba, provincial director for Congo's artisanal mining agency SAEMAPE, said workers had been tunnelling underground at the mine near the provincial capital Tshikapa when Tuesday's accident occurred.
