© AP Photo/ Markus Schreiber
Three members of the German parliament are due to present their report on the BND's activities in Europe and the United States to a parliamentary oversight committee later in the day.
According to the German radio station RBB, the BND allegedly spied on a German diplomat and French Foreign Minister Laurent Fabius.
"The current federal government is doing everything to allow no enlightenment in the BND affair," board member of the Friedrich Naumann Foundation for Freedom Sabine Leutheusser-Schnarrenberger said in a statement.
In April, German media revealed that the BND had assisted the US National Security Agency (NSA) in spying on top political figures throughout Europe in exchange for access to cutting edge surveillance technology.
The Bundestag committee was set up to probe the spy scandal, including eavesdropping on millions of Germans by various foreign intelligence agencies.
Comment: Merkel has plenty on her plate, with conservative factions in the country furious that she was not tough enough on Greece, and others even more furious at her 'open arms' immigration policies. With the NSA and BND scandals lurking in the background, and with who knows how much blackmail material they have waiting in the wings, it looks like Germany is under siege by some very nasty people.
Read more: