Miami building collapse: at least four dead and dozens missing

Rescue workers are still looking for 159 people who are unaccounted for after a building collapsed in Miami.

At least four people are known to have died when part of the 12-storey block collapsed.

Hundreds of rescuers are using sonar equipment and dogs to try to find survivors.

The building, which was built 40 years ago, collapsed in the middle of the night when many residents would have been asleep.

Warning: This report contains images of the moment the building collapsed.