Guardian: Rescue teams have struggled to reach villages devastated by a massive mudflow after two dams burst at a major iron ore mine in south-east Brazil.
The twin bursts, which mining executives think could have been triggered by an earth tremor, wrought havoc more than 50 miles downstream and prompted officials to warn that many people are likely to have died.
Nineteen people have been confirmed as missing, the local fire department said six residents of nearby villages, along with 13 workers from...