BBC story with more info on search ruling out MH370 being in the 'ping area':
The area where acoustic signals thought linked to the missing Malaysian plane were detected can now be ruled out as the final resting place of flight MH370, Australian officials say.
The Bluefin-21 submersible robot had finished its search of the area and found nothing, they said.
Efforts would now focus on reviewing search data, surveying the sea floor and bringing in specialist equipment.
Read more at
http://bbc.com/news/world-asia-27615173