Aviation enthusiasts EGXWinfo Group have posted an audio clip online, which they claim to be a recording of an RAF pilot trying to make contact with the Latvian plane.
In it, the pilot warns that the plane will be shot down if it does not follow his instructions.
To hear the warning from the RAF "....if you do not respond to my orders immediately you will be shot down" visit http://t.co/aAKjoECAbq
The Ministry of Defence refused to confirm or deny whether the audio was genuine.
Audio from SoundCloud/The EGXWinfo Group
More top news
Aron Warren was found dead in his flat.
Trusts have had to cope with millions of pounds being cut from their budgets - and some have lost hundreds of trained nurses.
TfL bosses say they need an inflation +1% increase from 2021 to cover Crossrail losses.