At least 17 people are dead and dozens more are missing after a dam burst at a mining site in Brazil, causing a massive mudslide, officials say.

The mudslide erupted Thursday from a reservoir of waste at an iron ore and minerals mine in Mariana, Brazil, unleashing waves of toxic red sludge on the nearby city of Bento Rodrigues.

Television footage showed a torrent of muck that had swamped houses and ripped off roofs.

Bento Rodrigues is 80 percent buried, according to the city's fire chief. The village has a population of about 600, many of whom are still missing.

Brazilian authorities say they have stepped up efforts to locate and provide care for victims of the devastating mudslide.

Watch the "Shepard Smith Reporting" clip above.

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