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A British navy ship with sophisticated sound-locating equipment arrived on Monday in a patch of the southern Indian Ocean to determine whether underwater sounds picked up by a Chinese ship crew using a hand-held device came from the missing Malaysia Airlines black boxes.

Scores of angry relatives of the Chinese passengers aboard Flight MH370 set out on a protest march to the Malaysian embassy in Beijing on Tuesday to demand more answers about the crashed plane's fate.

A British navy ship with sophisticated sound-locating equipment arrived on Monday in a patch of the southern Indian Ocean to determine whether underwater sounds picked up by a Chinese ship crew using a hand-held device came from the missing Malaysia Airlines black boxes.

Scores of angry relatives of the Chinese passengers aboard Flight MH370 set out on a protest march to the Malaysian embassy in Beijing on Tuesday to demand more answers about the crashed plane's fate.