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Islamic State terrorists have banned skinny jeans as part of their crackdown on freedom of expression.

Any hipsters wearing the trendy jeans, listening to music on their mobile phones, or smoking, could be jailed by the terrorists for ten days.

They would also be forced to take an Islamic course and to stay in prison until they pass, it was reported in Raqqa, Syria.

The new laws were revealed by the anti-ISIS campaign group Raqqa is Being Slaughtered Silently (RBSS).

(Image: Rex)

A ban on listening to music is not new to Sharia law, but RBSS says the terror group is cracking down on the behaviour of jihadis with tougher rules.

Jassem, a Syrian resident, told the group: "Freedom of expression has become a crime, so you can not oppose a decision issued by the group," the Mail Online reports.

"Otherwise you will be arrested on charges of violation of God’s law as its fighters claim, but they are far from this law."

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He added: "There is no difference between ISIS and Assad’s regime: bribery and favoritism are widespread within the group and play a major role, especially among the local members of the group."

ISIS stepped up its anti-smoking campaign last month by carrying out a second mass cigarette burning.

Photographs taken in the northern town of Barqah, close to the border with Turkey, show the group's religious police force setting light to vast piles of cigarettes in a field.

ISIS also put up anti-smoking posters featuring images of burning human lungs to scare militants into packing in smoking.