BERLIN - Islamic State posted pictures on the Internet calling on German Muslims to carry out Brussels-style attacks in Germany, singling out Chancellor Angela Merkel's offices and the Cologne-Bonn airport as targets, the SITE intelligence group reported.
Western Europe is on high security alert after last week's Islamic State suicide bombings in the Belgian capital that killed 32 people at its airport and in a metro station. On Wednesday, France said it was investigating a man on suspicion of planning an imminent act of "extreme violence".
The Islamic State images and graphics, widely published by German media on Thursday, included slogans in German inciting Muslims to commit violence against the "enemy of Allah."
Germany's BKA federal police, who monitor suspected militants with German passports returning from stints fighting in Syria and Iraq, said it knew of the images but that their publication did not necessitate extra security measures.