The piece in a newspaper says the result threatens Europe's unity
The Islamic militant group ISIS has apparently welcomed Britain's vote to leave the European Union.
The piece in al-Naba magazine has hailed the move by the UK, saying it "threatens the unity of Crusader Europe."
The UK Independent says the article was written by propagandists, and noted "shock in political and economic circles" after the vote - as well as the drop in the value of the pound and the markets.
Shiraz Maher is a lecturer at King's College London's International Centre for the Study of Radicalisation.
He says: "Islamic State tacitly welcomes Brexit vote in al-Naba magazine."
"(They) don't openly welcome the result or anything like that, but it's clear they want a weakened Europe and they see this as helping," he wrote on Twitter.
The group also reportedly alluded to ambitions by other areas of the UK to break away.