Underwater hunt for MH370 begins

Two ships equipped with electronic "pinger" search devices have started the underwater hunt for missing flight MH370's black box.

Angus Houston, head of the Joint Agencies Coordination Centre, told reporters that the vessels would "search a single 240km track converging on each other".

The wider search efforts are focusing on an area of about 217,000 sq km (84,000 sq miles), 1,700 km (1,000 miles) north-west of Perth.