German intelligence listened in on at least one telephone conversation of US Secretary of State John Kerry and has spied on NATO ally Turkey for years, Der Spiegel says.
According to the reports, the Clinton intercept was "not an isolated case", with the German government apparently giving permission for "spying on a NATO partner", although it was unclear which of its allies was the target.
In its report to be published on Sunday, it says the German government reviews its espionage program every four years but did not modify its priorities after the scandal over US spying.
Relations between Germany and the US have been deeply strained by revelations from fugitive US intelligence agent Edward Snowden last year that Washington had conducted intensive spying operations in Germany, including eavesdropping on Chancellor Angela Merkel's mobile phone.
The reports by three German media outlets said documents passed to the CIA by one of its moles inside German intelligence show it eavesdropped on Clinton while she was on a US government plane.
The German weekly will on Sunday publish a report saying the secret service BND intercepted a conversation involving Kerry "by accident" in 2013.
Der Spiegel's revelations come after reports on Friday that the German secret service listened in on at least one of Hillary Clinton's telephone calls when she was US secretary of state.
Read more here: Business Spectator