Updated: 05/29/2014 07:17 | By Agence France-Presse

Acoustic pings at heart of MH370 hunt 'not likely from black box'

Four acoustic transmissions that have been the focus of the search for missing Malaysia Airlines Flight 370 are no longer believed to have come from the plane's black box, a US official said on Thursday.


Acoustic pings at heart of MH370 hunt 'not likely from black box'

Koji Kubota of the Japan Coast Guard keeps watch for debris on board the Japan Coast Guard Gulfstream V aircraft whilst in the search zone for debris from Malaysia Airlines flight MH370 on April 1, 2014 - by Paul Kane

The US Navy's deputy director of ocean engineering Michael Dean told CNN there was now broad agreement that they came from some other man-made source unrelated to the jet that disappeared on March 8 carrying 239 people.

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