Prime Minister Tony Abbott has said Australian Maritime Safety Authority has received credible information that two objects located in their search have been linked to missing Malaysian Airlines flight MH37.
Satellite imagery had spotted the two objects in the Southern Indian Ocean.
Australia was leading the search in what authorities in the "south corridor" as part of the international search for the missing flight.
The prime minister said “two possible objects related to the search have been identified” to parliament.
A RAAF Orion has been sent to the location and was due to arrive around now. Three more aircraft are due to fly to the location.
"The Australian Maritime Safety Authority has received information, based on satellite imagery, of objects possibly related to the search," the prime minister said.
"Following specialist analysis of the this satellite imagery two possible objects related to the search have been identified.
"I can inform the House that a RAAF Orion has been diverted to attempt to locate the objects. This Orion is expected to arrive in the area at about this time.
"Three more aircraft will follow this Orion. They are tasked for a more intensive follow-up search.
"I have spoken to my Malaysian counterpart Prime Minister Najib Razik, and informed him of these developments.
"I must inform the house the task of locating these objects will be extremely difficult and it may turn out that they are not related to the search for Flight MH 370."