The Prime Minister's Office has declined to comment on the report.
According to the report, the BND has also been spying on the American space agency NASA, the US Air Force, the US State Department, and American diplomats across Europe. In addition, the interior ministers of Austria and Belgium, the British Ministry of Defense and the main headquarters of the Organization of the Petroleum Exporting Countries (OPEC) and the International Monetary Fund (IMF) were also targeted.
In October, Der Spiegel reported that the BND was spying on the US Department of the Interior, different European countries and even the Vatican. In addition German intelligence reportedly eavesdropped on conversations of American diplomats stationed in Brussels and in the UN.
The BND also had emails, phones and faxes of embassies and consulate belonging to the US, UK, France, Sweden, Spain and other countries under constant monitoring.
German intelligence wasn't just spying on nation states. According to Der Spiegel, it also spied on international organizations, like the Red Cross's headquarters in Geneva.
In 2013, the BND reportedly made a decision to stop spying on European Union member states, as well as NATO officials, but it appears the espionage continued.
Also in 2013, the German government learned that the United States was spying on Chancellor Angela Merkel, leading to an international uproar and strained ties between the two nations. Mekel condemned the American spying and told US President Barack Obama: "Spying between friends, that's just not done."
Itamar Eichner contributed to this report.