European police officials were told in September there were around 50,000 Europeans fighting with ISIS.
An ISIS operative in November revealed the terror group had successfully smuggled thousands of covert jihadists into Europe.
The Syrian operative claimed more than 4,000 covert ISIS gunmen had been smuggled into western nations.
Today the German spy agency BfV admitted ISIS has sent fighters into Europe disguised as refugees.
Islamic State militants have slipped into Europe disguised as refugees, the head of Germany’s domestic intelligence agency (BfV) said on Friday, a day after security forces thwarted a potential IS attack in Berlin.
Hans-Georg Maassen said the terrorist attacks in Paris last November had shown that Islamic State was deliberately planting terrorists among the refugees flowing into Europe.
“Then we have repeatedly seen that terrorists … have slipped in camouflaged or disguised as refugees. This is a fact that the security agencies are facing,” Maassen told ZDF television.