Germany’s domestic intelligence agency, BfV, says the Islamic State group “slipped in” with the 1.1 million migrants Chancellor Angela Merkel invited into the country last year. BfV head Hans-Georg Maassen’s comments come just one day after two Algerian men suspected of training with ISIS were arrested in Berlin. Police found two other men suspected of terrorist ties but did not formally take them into custody. “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 on Friday, Reuters reported. “We are trying to recognize and identify whether there are still more ISIS fighters or terrorists from ISIS that have slipped in.”

Maassen’s public disclosure comes less than two months since a captured ISIS terrorist known only as “Harry S” warned Der Spiegel of future terror attacks. The 27-year-old told the magazine he wanted to “come clean” about what Germany can expect in the months and years ahead. German police have already been overrun with crimes linked to migrants from the Middle East and North Africa, including a slew of sexual assaults that took place on New Year’s Eve. Over 100 women were victimized by migrants in Cologne, Bielefeld, Duesseldorf, Frankfurt, Hamburg and Stuttgart. FULL REPORT