Officials in Indonesia say they fear all 104 people onboard a Boeing 737 airliner, which crashed on the island of Sumatra, have died. The aircraft, belonging to the Singapore-based airline, SilkAir, went missing while en route from Jakarta to Singapore. A statement from the airline says most of the passengers were either Singaporeans or Indonesians, but there were a number of other nationalities onboard, including three Britons. This report is from our Jakarta correspondent, Jonathan Head:

Indonesian rescuers say they've found the wreckage of the crashed airliner in swampy ground on the coast of Southern Sumatra. Members of the Indonesian armed forces are now involved in looking for survivors, but, as night has already fallen here, they expect the search to take some time.

Air traffic controllers say they lost contact with the Boeing 737, belonging to the Singapore-based airline, SilkAir, about an hour after taking off from Jakarta, en route for Singapore. The aircraft was carrying 97 passengers and seven crew members.

A statement from SilkAir said more then half the passengers were from Singapore and Indonesia, but there were a number of other nationalities on board, including three Britons. SilkAir is a subsidiary of Singapore Airlines and serves destinations throughout South-east Asia.

This is the first time one of its aircraft has crashed. 1997 has already been a bad year for air safety in Indonesia.