A German intelligence agent on Tuesday said he pretended to be a jihadist planning an attack in online chatrooms because he was bored, as he went on trial for attempted treason.

The 52-year-old suspect, named as Roque M., made headlines when he was arrested last November in what initially appeared to be a case of an Islamist mole at work in Germany's domestic spy agency.

But he was freed in July after prosecutors dropped most of the charges, finding no evidence of an attack plot or ties to Islamist groups.

"I never met with any Islamists. I would never do that. The whole thing was like a game," the suspect said at the start of his trial in the western city of Duesseldorf, according to DPA news agency.

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