The Green Brigade has mocked a group of Rangers ultras after stealing their clothing, drums, flags and banners.
The Celtic fan group infiltrated the Union Bears as they poked fun at their counterparts on social media over the weekend.
The Celtic ultras posed for photos as they sang Rangers chants that the Union Bears would sing at games.
The group took to their social media channels to reveal their haul, captioning the posts: "Loose-talk costs materials."
The Green Brigade wasn't finished there, as they showed an image of a sympathy card. They added: "To UB. Thinking of you all. GB xx."
The weekend's actions come a short while after the Rangers fan group had acted in a similar way to their rivals.
In May, the Union Bears stole banners from the Green Brigade. They flipped the message after a game against Kilmarnock.
Holding the banners aloft, the message read: "Green Brigade. Serial losers of banners."
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Meanwhile, Ange Postecoglou was involved in a fierce TV exchange after Tottenham's loss to Arsenal.
The former Celtic manager faced questions over his previous suggestion that he tastes success in his second season at clubs after the 1-0 North London derby defeat.
But, bullish Postecoglou was unshaken in a Sky Sports interview as he vowed to win something at Spurs this season despite falling to Arsenal.
In a live interview, Postecoglou was asked: "You said at the start of the season, the first campaign was really about setting principles and getting your message across, the second campaign you normally win.
"Are you seeing enough in this side that this season you do think they will be a side that can win?
"I'm talking silverware, competing right at the top..."
