A German citizen employed by Germany's domestic intelligence agency has been arrested on accusations he made Islamist declarations on the internet and revealed internal agency material, the agency said on Tuesday.
A spokesman for the Bundesverfassungsschutz (BfV) declined to provide details on the man's position at the agency or say when he joined. He also declined to comment on a report in Die Welt newspaper that the 51-year-old had planned to explode a bomb at the agency's central office in Cologne.
"There is no evidence to date that there is a concrete danger to the security of the BfV or its employees."
"The man is accused of making Islamist statements on the Internet using a false name and of revealing internal agency material in Internet chatrooms," he said. "The man behaved inconspicuously during his employment process, training and in his area of responsibility."
Der Spiegel magazine reported on its website that the agency first became aware of the man's activities about four weeks ago.
German authorities have ramped up their surveillance of potential militant Islamist groups and individuals after two attacks claimed by the Islamic State group in July.