An Indonesian official says objects have been spotted in the sea by a search plane hunting for the missing AirAsia jet.
Jakarta's Air Force base commander Rear Marshal Dwi Putranto said he was informed on Monday an Australian Orion aircraft had detected suspicious objects near Nangka island, about 160 kilometres south-west of Pangkalan Bun, near central Kalimantan.
AirAsia CEO Tony Fernandes visited Juanda International Airport in Indonesia while the search was underway on Sunday.
'However, we cannot be sure whether it is part of the missing AirAsia plane,' Rear Marshall Putranto said.
'We are now moving in that direction, which is in cloudy conditions.'
An Indonesian helicopter saw two oily spots in the search area Monday afternoon, and an Australian search plane spotted objects hundreds of miles away.
The flight went missing at 6.17am local time on Sunday while travelling from Indonesia to Singapore with 162 people on board, speculation on what may have happened points to weather, speed and an older radar system.
AirAsia confirmed there were 155 passengers on board - including 138 adults, 16 children and one infant - and also stated there were two pilots, four flight attendants and one engineer on board.
Nationalities of passengers and crew onboard are one Singaporean, one Malaysian, one British, one French, three South Koreans and 155 Indonesians.