Germany's Former Spy Chief August Hanning Arrested on Suspicion of Treason and Espionage

German authorities have arrested the country's former foreign intelligence chief on suspicion of treason and espionage, prosecutors confirmed on Tuesday, in a case that has stunned the nation's security establishment and raised troubling questions about the stewardship of some of Berlin's most sensitive secrets.

August Hanning, who served as president of Germany's Federal Intelligence Service (BND) between 1998 and 2005, was taken into custody in Bad Toelz-Wolfratshausen in southern Germany. The 80-year-old is under investigation for attempted treason and for acting as an agent of a foreign intelligence service, according to the Office of the Federal Public Prosecutor General, which announced the arrest.

In a parallel operation, Hanning's former chief of staff was also arrested. The man, only partially identified by authorities as Manfred D., was detained in Steinfurt in western Germany. He faces allegations of "aiding and abetting attempted treason and treasonous espionage," prosecutors said.

The case first became public through a statement from federal prosecutors detailing what they described as a long-running scheme that allegedly funnelled thousands of classified documents out of the intelligence service. According to the prosecutor's office, Hanning at one point used classified intelligence supplied by Manfred D. to prepare an analysis destined for an officer of a foreign intelligence service.

Investigators say Manfred D. held the position of chief of staff not only for Hanning but also for his successors, serving in that role between 2012 and 2026. Prosecutors allege that he exploited his position to access confidential material, which he then handed to Hanning "in exchange for remuneration." Hanning is accused of subsequently using that information in his private consulting work.

The scale of the alleged leak is striking. Federal prosecutors said their current findings indicate that over the years Manfred D. provided Hanning with roughly 2,000 documents, many of which contained classified information intended exclusively for internal use by the Federal Intelligence Service. Among these, according to the statement, were materials prepared specifically for executive intelligence briefings, some of the most tightly guarded products of Germany's spy apparatus.

The prosecutor's statement did not disclose which country or intelligence service the two men were suspected of working for, nor did it identify the foreign agent who allegedly received the analysis. Authorities added that it remains to be determined whether the material actually reached its intended recipient, leaving open the possibility that some of the compromised information never completed its journey.

Officers searched properties linked to both men in multiple locations, including in the capital, Berlin. The searches underline the gravity with which investigators are treating the case, which touches on the core functions of an agency responsible for gathering and protecting some of Germany's most closely held intelligence.

The arrest of a former BND president marks a rare and deeply uncomfortable moment for Germany's security apparatus. The BND, headquartered in Pullach and later Berlin, is responsible for foreign intelligence gathering, and its leadership is entrusted with knowledge that can affect the country's diplomatic, military and security posture. A former president facing accusations of spying for a foreign power is therefore a matter of exceptional sensitivity.

The timing is also notable. Manfred D.'s tenure as chief of staff extended until 2026, meaning the alleged transfer of documents continued well after Hanning left his post at the top of the agency in 2005 and even after his successor's time in office. That raises questions about internal oversight, vetting and the durability of access controls inside Germany's most secretive federal agency.

German officials reacted swiftly and with outrage. Marc Henrichmann, a member of parliament who chairs the Bundestag's intelligence oversight committee, told the AFP news agency that Germany "will not tolerate the betrayal of secrets." He added, "Whoever allies themselves with the enemies of our liberal democracy will be found out."

Henrichmann's comments reflect the political sensitivity of the matter, particularly at a time when Germany and its European partners are focused on countering foreign espionage and sabotage activities. The case is likely to intensify scrutiny of how the BND safeguards classified material and how rigorously it monitors the conduct of current and former personnel who retain access to sensitive networks and documents.

Hanning's career after leaving the BND included work as a private consultant, a role prosecutors allege he used to exploit the information he received. That detail may prompt broader questions about the revolving door between intelligence work and private advisory roles, and about the rules governing how former senior officials handle their contacts and knowledge.

The investigation remains active. Prosecutors have not named the foreign service suspected in the case, and it is unclear when charges might be formally filed. For now, the two men remain in custody as authorities examine the roughly 2,000 documents at the centre of the alleged operation and trace how far the material may have travelled.

The case has already cast a shadow over the legacy of a man who once led one of Europe's most important intelligence agencies. It also serves as a stark reminder that in espionage investigations, the damage often lies not only in what was taken, but in how long the alleged activity went undetected and how much trust was misplaced in the process.