IG•GETTY ISIS terrorists may have smuggled deadly gas into Europe

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The chemical weapon Sarin can cause death in minutes but is undetectable because it has no taste, no smell and no colour. It was used most recently in an attack during the Syrian civil war, with up to 1,800 people killed. The shocking claim was made by Ahmed Gaddaf al-Dam, Colonel Gaddafi's cousin.

It is the latest in a string of warnings that the terror group has taken advantage of the humanitarian crisis to launch attacks against Europe. Mr Gaddaf al-Dam also warned that ISIS could spark a global "catastrophe" and "nobody will be spared" if the West does not follow Russia in propping up Syrian president Bashar al-Assad. The former Syrian intelligence official said European countries would be powerless to stop "suicide bombers from hell" and the flow of oil through the Suez Canal would be blocked.

The price of oil would soar to a staggering £130 a barrel, causing to Greece, Italy, Spain and Portugal to default, he claimed. He also warned this could bring about a European "Spring" of revolutions – similar to the Arab Spring across the Middle East in 2011. Meanwhile, Israel could be "attacked from its four corners by thousands of suicide bombers", Gaddaf al-Dam said.

IG Ahmed Gaddaf al-Dam said the terror group could spark a 'catastrophe'

IG Notorious ISIS killer Jihadi John, also known as Mohammed Emwazi

AFP•GETTY Sarin can cause death in minutes

He told the MailOnline: "What is happening now warns of a forthcoming catastrophe. which will affect the whole world. "Everybody must reconsider... before it is too late for nobody will be spared." Last month an operative working for ISIS claimed more than 4,000 covert gunmen had been smuggled into Europe. Boasting about the success of the ongoing clandestine operation, he smiled: "Just wait".