BERLIN -- German authorities say they have arrested a man who offered his services as an agent to three foreign intelligence services.

Federal prosecutors said the 27-year-old German, identified only as Danny Guenter G. in line with local privacy rules, was arrested in Leipzig on Wednesday. They said Friday he was released but is still under investigation for declaring himself prepared to carry out espionage.

Prosecutors said the suspect sent application letters to three foreign services, which they didn't identify, asking to be employed as an agent. They added "he said he was prepared, if he was recruited, to carry out any activities asked of him."