The Austria Press Agency cited German federal police chief Hans-Georg Maasen as saying that some who blend in with the migrants fought with IS and are planning a “combat mission” once they arrive in Europe. He said Thursday that his office knows of 7,900 Islamic radicals in Germany who advocate violence to advance their goals, with some trying to win migrants to their cause.
He said German authorities receive one or two “fairly concrete tips” a week of planned terrorist activity. And he described IS extremists as “combat-hardened professionals” more dangerous than those from al-Qaida
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