Missing flight QZ8501: High security at Singapore airport
An AirAsia flight travelling from Indonesia to Singapore with 162 people on board has lost contact with air traffic control.
Flight QZ8501 lost contact at 07:24 (23:24 GMT), Malaysia-based AirAsia tweeted.
Indonesian military planes and aircraft from Singapore have been searching an area of the Java Sea.
The BBC's Karishma Vaswani reports from Changi Airport in Singapore.