Another tidbit that it might have crashed over land:
16.30 Tom Phillips, our correspondent in Kuala Lumpur, says villagers from near Marang, on Malaysia's eastern coast, told police they had heard a "loud and frightening noise" at around 1.20am on Saturday morning.
Alias Salleh, a 36-year-old lorry driver told Malaysia's The Sun Daily, he and friends had run towards the source of the noise, "but did not see anything unusual".
The noise sounded like "the fan of a jet engine," Mr Salleh added.
Mohd Yusri Mohd Yusof, a 34-year-old villager, said: "My friends and I heard the ringing noise for about two minutes."
May have been the jet itself flying very low. The noise in downtown NYC the day of 9/11 when the first passenger plane flew over (right down 5th Avenue) at building top height was deafening.