Germany's social democratic icon Willy Brandt allegedly served as a U.S. agent

Willy Brandt (right) with John F. Kennedy in 1961.

Former German Chancellor Willy Brandt, an icon for Europe's social democracy, is believed to have been an informant for the U.S military intelligence Counter Intelligence Corps (CIC) for four years before he came to power in 1969-1974, according to Der Spiegel.

Brandt, who served as leader of the Social Democratic Party (SPD) from 1964 to 1987, provided intelligence to the CIC from 1948 to March 17, 1952, Der Spiegel has reported.

The magazine wrote that Brandt briefed the CIC about the activities of the FDJ, the youth wing of the German Democratic Republic (DDR) and the ruling Socialist Unity Party (SED).