A dam collapsed in the Brazilian town of Brumadinho, leaving 65 dead and over 250 still missing, with numbers expected to rise in the coming days.

Brazilian and Israeli rescue workers are still searching for bodies through treacherous mud as of Monday after the burst dam spilled a flood of iron ore waste.

Brazilian authorities are now probing Vale SA, the world’s largest producer of iron ore, for explanations on the dams failure, with courts freezing approximately $3 billion from Vale assets for state emergency services.