Oceanographers in Germany have contended after a computer simulation that the search for the wreck of Malaysia Airlines flight MH370 is thousands of kilometres off-beam.
A wing part from the plane that washed up a month ago on the island of Reunion "probably came from the eastern equatorial Indian Ocean," said Andreas Villwock of the Geomar Helmholtz Centre for Oceanography in Kiel on Friday.
That would be thousands of kilometres from the previously presumed crash site at 35 degrees latitude south of the Equator.
The Kiel lab used a model of ocean currents to guess its drift path.
The Boeing 777 vanished on March 8, 2014 on a flight from Kuala Lumpur to China with 239 people aboard including six Australians and two New Zealanders.
The Geomar institute said it would give details at a news conference on Tuesday. The wing part is in Toulouse, France for examination.
French investigators strongly assume it comes from the lost jet.