The Australian Transport Safety Bureau ruled out any link between material found on a beach in southwestern Australia and the missing Malaysia Airlines jet.
Debris described as "unidentified material" was found Wednesday on a beach near Augusta, more than 300 kilometres south of Perth, by a member of the public and handed to police.
The ATSB decided to examine photographs of the material to determine whether it was linked to the search for the missing jet.
Photographs were also provided to the Malaysian investigation team.
However ATSB chief commissioner Martin Dolan scotched any hope of a breakthrough.