Two teenage neo-Nazis are facing jail for encouraging terrorism in online messages - to a group which posted threats against Prince Harry .
Michal Szewczuk, 19, pleaded guilty to two charges relating to posts on social media site GAB between August and September last year.
He ran one of them, while the other was affiliated with the far-right group Sonnenkrieg Division.
Szewczuk, a Polish national, also admitted five charges relating to the possession of documents likely to be useful to a terrorist.
These included The Anarchist Cookbok and The Al Qaeda Manual.
Oskar Dunn-Koczorowski, 18, earlier admitted encouraging terrorism relating to the same account used by Szewczuk as well as another run by himself.
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The Sonnenkrieg Division posted a picture of the Duke of Sussex set against a swastika, with a gun pointed at his head and the slogan: "See ya later, race traitor!"
The group is an off shoot of the American Atomwaffen Division, which encourages terrorism and worships Adolf Hitler and Charles Manson.
Referring to the images posted on Gab at an earlier hearing prosecutor Jessica Hart said: "The imagery in all of the messages is very similar in style, it appears to have been made by the same artist.
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"The issue is likely to be if the material encourages terrorism."
She explained how the pair shared the Sonnenkrieg Gab account, with both posting from the same account at different times.
Judge Rebecca Poulet QC warned both teenagers they could face custody when they return to court for sentencing on 17 June.
Szewczuk, of Wyther Park Estate, Bramley, Leeds, admitted two counts of encouraging terrorism and five of possessing documents likely to be useful to a terrorist.
Dunn-Koczorowski, from Acton, west London, earlier admitted two charges of encouraging terrorism.
