Search for survivors resumes after second Brazil dam alert

Rescue teams have resumed their search for hundreds of people still missing after a dam collapsed in south-eastern Brazil on Friday, officials say.

Authorities paused the search for hours amid fears that a separate dam was at risk of giving way in the area.

About 3,000 people were then evacuated, local fire fighters told the BBC.

At least 37 people have been killed and more than 250 others are feared dead in Friday's disaster at an iron ore mine near the town of Brumadinho.

Both dams at the mining complex belong to Vale, Brazil's largest mining firm.

On Sunday, warning sirens rang out at 5:30 local time (7:30 GMT) over Brumadinho, which is home to some 39,000 people.

All the town's bridges were ordered to close, while residents rushed to higher ground.

"With bags on their backs, everything they could grab, children, old people climbing up, it was total despair," one man told the BBC.

The rupture on Friday occurred at one of Vale's iron-ore "tailings" dams, which are typically used to hold mining waste.