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Islamic State butchers are ordering British jihadis not to travel to Syria and instead stay in the UK and await orders to launch an attack, it has been claimed.

Startling claims have emerged that appears to show how days before the horrifying attacks in Paris , twisted fanatics in the UK were being told of plans for terror to be unleashed in both France and Britain.

According to Mail Online, overlords in Syria have been sending messages to British-based jihadis telling them to lay low and not risk travelling to war-torn Syria.

The fanatics are advised to stay hidden in the UK until ISIS commanders give the order to launch an attack on British soil.

According to reports, the messages were sent via encrypted messaging sites over the past few days.

Read more:New footage shows harrowing aftermath outside Paris attacks bar as blood-soaked bodies lie in street

(Image: REUTERS)

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It is claimed the UK-based extremists are being grilled over what weapons they have, how much ammunition they have stockpiled and how they are keeping hidden.

The messages are also said to show ISIS commanders laying out rules for any attack in the UK , with senior figures telling them only to target 'kuffars' - unbelievers - and not to kill any Muslims in the attack.

Mail Online spoke to security sources who said the messages, although impossible to verify, signify a shift in the way the vile terror group is operating.

(Image: AFP) (Image: Getty)

The horrifying claims come just a week after eight terrorists murdered 130 people and injured hundreds more in a series of chilling attacks in Paris.

The terror in the French capital continued on Wednesday when the mastermind of the attack, Abdelhamid Abaaod, was killed along with two other suspected terrorists during a siege on an apartment in the Parisian suburb of St Denis.

Yesterday, 21 people were killed when other terrorists launched an attack on a hotel in Mali.

Read more:New footage shows harrowing aftermath outside Paris attacks bar as blood-soaked bodies lie in street

(Image: PA) (Image: Reuters)

News of the new terror threat to the UK comes after the Director General of MI5 admitted his spies ability to intercept communications was becoming harder.

Andrew Parker said: "We are seeing plots against the UK directed by terrorists in Syria; enabled through contacts with terrorists in Syria; and inspired online by ISIL’s sophisticated exploitation of technology.

"It uses the full range of modern communications tools to spread its message of hate, and to inspire extremists, some in their teens, to conduct attacks in whatever way they can.

(Image: Reuters) (Image: Getty)

"The speed at which the process of radicalisation can occur online, and the emphasis on relatively low sophistication but nevertheless potentially deadly plots, are two major challenges.

"On top of that, we have seen greater ambition for mass casualty attacks. All of this underlines the growing threat we face."