U.S. and German officials fear terrorists are in the advanced planning stages of an attack on U.S. military personnel or tourists in Germany. "The information behind the threat is very real," a senior U.S. official told ABC News.
German Interior Minister Wolfgang Schauble told reporters, "The danger level is high. We are part of the global threat by Islamist terrorism." Of particular concern, according to U.S. and German law enforcement officials, is Patch Barracks, the headquarters for U.S. European Command, near Stuttgart.

A threat warning issued by United States in Germany last month could involve attack plans by an al Qaeda-affiliated group of Kurdish extremists, officials said on Friday. U.S. and German authorities said, however, that there was no new threat in Germany beyond the official April 20 State Department warning. They were responding to a report by ABC News on its Web site on Friday that officials believed terrorists were in the advanced planning stages for an attack on U.S. military personnel or tourists in Germany. In the April 20 warning, the U.S. embassy in Germany encouraged Americans in the country to increase their vigilance and take appropriate steps to bolster their personal security.

Hundreds of German police combed offices and flats associated with leftwing activists across six northern cities yesterday, saying they had evidence that a terrorist organisation was planning to disrupt next month's G8 summit.