A Twitter user who posted a “joke” bomb threat against a UK airport could be jailed after pleading guilty to sending a menacing message.

Paul Chambers, 26, of Balby, Doncaster, admitted posting an ill-considered message onto Twitter about Robin Hood Airport, South Yorkshire, on 6 January after the airport closed as a result of unusually heavy snow, The Independent reports. Chambers, who was due to fly over to Ireland around a week later, wrote:

Crap! Robin Hood Airport is closed. You’ve got a week and a bit to get your shit together otherwise I’m blowing the airport sky high!

Chambers has already been suspended from work and banned from Robin Hood Airport for life.