Australia has added an extra plane in its contribution to the search for the AirAsia flight that went missing in bad weather in the Java Sea with 162 people on board.
Two RAAF P3 Orion planes with specialist search equipment are now part of the international search to find AirAsia flight QZ8501 that disappeared on Sunday morning.
Their search is focussed to the west of the island of Kalimantan, Foreign Minister Julie Bishop says.
Ms Bishop wouldn't comment on reports the RAAF had spotted debris and an oil slick during its search on Monday.
"I'm sure there will be sightings of all sorts of debris in the ocean, but we will wait until there's actual confirmation of the plane sighting before we make any official comment on that," she said in Adelaide on Tuesday.
The two planes are part of a broader offer of support from the Australian government to Indonesian authorities.
Air traffic controllers lost contact with the AirAsia plane on Sunday morning after it left Indonesia en route to Singapore.
Ms Bishop confirmed there were no Australian citizens, permanent residents or dual nationals among those on board.
But she said officials were still trying to confirm reports Indonesian student Kevin Alexander Soetjipto, who's been studying in Melbourne, was on board.
Mr Soetjipto, from Malang in East Java, was studying finance at Monash University's Clayton campus, according to his LinkedIn profile.
He was due to graduate next year.
Monash spokeswoman Stacey Mair said the university was also still seeking official confirmation from authorities.
"We are deeply saddened to learn this news in relation to one of our valued student community," she told AAP.
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