In this picture, taken Saturday June 29, 2013, a demonstrator protests with a poster against NSA in Hanover, Germany. Germany's top justice official says reports that U.S. intelligence bugged European Union offices remind her of "the methods used by enemies during the Cold War." Justice Minister Sabine Leutheusser-Schnarrenberger was responding to a report by German news weekly Der Spiegel on Sunday June 30, 2013, that claimed the National Security Agency has eavesdropped on EU offices in Washington, New York and Brussels. The magazine cited classified U.S. documents taken by NSA leaker Edward Snowden that it said it had partly seen. The documents reportedly describe the European Union as a "target" for surveillance. (AP Photo/dpa, Peter Steffen)

The German government wants "trust restored" with the United States following reports that American intelligence agencies bugged European Union offices, and has invited the U.S. ambassador in Berlin to the Foreign Ministry for a meeting on Monday.

A spokesman for German Chancellor Angela Merkel told reporters in Berlin on Monday that she was "alienated" by the reported eavesdropping conducted by the U.S. National Security Agency.

Germany news weekly Der Spiegel reported Sunday that the NSA had bugged EU offices in Washington, New York and Brussels.

The report cited secret U.S. documents allegedly obtained by the NSA leaker and former contractor Edward Snowden.

Merkel's spokesman Steffen Seibert said that if the report was true the U.S. behavior was "unacceptable."