A vigil was held in memory of the victims of a dam collapse in the town of Brumadinho in southeast Brazil on Wednesday. /VCG Photo

On January 25, an iron ore tailings dam collapsed, releasing mining waste into the nearby community and causing possibly Brazil’s worst-ever environmental catastrophe. /VCG Photo

The death toll rose to 110 on Thursday, with 238 people still unaccounted for. Most of the victims are employees of Vale SA, the mining company that owned the collapsed dam. /VCG Photo

Seven days after the disaster, relatives of people unaccounted for are losing hope despite continuing rescue efforts. Some locals have been doing their own searches. /VCG Photo

“We don’t have strength to even cry any more. We keep coming to try to find the body, so we can have a burial,” a resident who likely lost her brother was quoted as saying by Reuters. /VCG Photo

Five people were arrested by Brazilian police over the disaster, including two subcontracted engineers and three Vale employees. UN experts have also called for an official investigation. /VCG Photo