Security has been tightened around Deutsche Bank headquarters in Frankfurt after apparently explosive powder was sent to its chief, Josef Ackerman.
The envelope was intercepted before it was received by Ackerman, who is one of the few senior managers in the country to be always surrounded by bodyguards.
Police say the powder appeared to be a homemade explosive, but declined to say whether there was a detonator in the envelope.
One staff member said: “There will always be people who think that this kind of thing will be a solution, a way to get back at someone. But as an employee I don’t feel threatened.”
Another said: “One thinks about the reasons and if this sort of thing is justified.”
At the moment it is unclear who sent the package, but the incident occurred at a time when anti-capitalist protesters across the world are demonstrating against what they see as the excesses of bankers.