Firearms, ammunition and chemicals were found in the apartment of a 43-year-old suspect in Braunschweig.
According to the police, the man had threatened to kill his superiors in a personal interview.
The background was his imminent resignation.
The man's colleagues then informed the emergency services.
The police found the 43-year-old in his apartment and temporarily arrested him.
Braunschweig - As a spokesman said on Wednesday, the Braunschweig resident was in possession of legal firearms and ammunition.
The chemicals and the suspect's home were examined by specialists.
dpa