Changi Airport has set up a waiting area for the family and friends of passengers on board the missing flight.
The Singapore government has also offered help to Indonesia authorities and has put two C130s on standby.
It has also been confirmed that at least 1 Singaporean is on board.
Full breakdown: 1 Singaporean, 1 English, 1 Malaysian, 3 South Koreans and 149 Indonesians, according to the manifest obtained by Metro TV.
Civil Aviation Authority of Singapore issued an official statement:
This story is developing. Please check back for further updates.
AirAsia has established an Emergency Call Centre that is available for family or friends of those who may have been on board the aircraft. The number is: +622129850801.