WATCH: Mikael Lustig celebrates Old Firm goal with policeman's hat

Celtic defender Mikael Lustig celebrated a goal against Rangers by pinching a policeman's hat.

Lustig grabbed the hat off the policeman's head after James Forrest had scored to put Celtic 3-0 ahead against their Old Firm rivals before half-time.

Celtic went on to win the match 5-0 and secure their seventh straight Scottish Premiership title.

Brendan Rodgers' side are now a Scottish Cup final win away from recording successive domestic trebles for the first time ever.

Hit play on the video at the top of the page to see Lustig's celebrations

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