A Sriwijaya Air plane with more than 50 people on board lost contact after taking off from Indonesian capital Jakarta on Saturday en route to Pontianak in West Kalimantan province, local media reported.
Metro TV said the plane was a Boeing B737-500.
Sriwijaya Air, an Indonesian airline, said in a statement it is still gathering more detailed information regarding the flight before it can make any statement.

Trump touts $5,000 payout if Republicans win as Vance waits in wings
Search expands after Philippine ferry fire kills five and leaves dozens missing
Trump says Iran war to end after US midterm elections
US military says it struck vessel in Caribbean, killing 3
At least 14 killed in explosion at weapons depot in Syria
