MH370 sub search cut short by 'programming oversight'

An "oversight in the programming" has been blamed after the robotic submarine deployed to search for the missing Malaysia Airlines plane had its first mission cut short.

The Bluefin-21 was sent to search the sea floor of the southern Indian Ocean - but exceeded its operating limit of 4,500m (15,000ft).

US Navy Captain Mark Matthews said "there was no evidence of aircraft" so far and the drone would be adapted and relaunched.