CANBERRA - Poor weather and limited visibility in the southern Indian Ocean are thwarting efforts to locate the debris which may be related to the missing Malaysia Airlines flight MH370.

The Australian military's P-3 plane has not been able to locate the debris which was spotted by a satellite and is believed to be floating around some 2,500km southwest of Perth.

The Australian Maritime Safety Authority (AMSA) said via its Twitter account on Thursday evening that the Royal Australian Air Force P3 crew had been unable to locate the debris as clouds and rain had brought about limited visibility.

"RAAF P3 crew unable to locate debris. Cloud & rain limited visibility. Further aircraft to continue search for #MH370," AMSA tweeted.

Australia revealed earlier on Thursday that two objects were spotted in the Indian Ocean, with the larger one measuring 24m, which is consistent with the measurements of a Boeing 777-200ER plane.

The search for the missing MH370, which was carrying 239 passengers and crew from Kuala Lumpur to Beijing on March 8, is now into its 13th day.