A German intelligence "double agent" who allegedly sold hundreds of top secret documents to the Americans was caught by his own country's counter-espionage agents while trying to broker an additional spying deal with the Russian secret services, according to intelligence sources in Berlin.
The bizarre twist to Germany's deepening "double agent affair" emerged yesterday after Chancellor Angela Merkel's Government summoned the US Ambassador to Berlin to "clarify" the second explosive case of suspected American intelligence spying against Germany within the space of a year.
On Saturday, Germany's Bundesnachrichtendienst (BND) intelligence service admitted that one of its agents had been arrested for supplying American intelligence with at least 300 top secret documents over a period lasting several years.
"The matter is serious," declared a German government spokesman.