DORTMUND, Germany (AP) — Several German news media organizations are reporting that the note found after the bomb attack on the Borussia Dortmund soccer team uses radical Islamic rhetoric – but that police are not sure whether the note is genuine or an attempt to throw them off the track.

Die Welt newspaper and Sueddeutsche Zeitung reported online that the note made reference to Germany’s participation in the military coalition opposed to Islamic State. German Tornado reconnaissance planes are taking part in a non-combat role. The papers said that experts on Islam were reviewing the note to try to establish its authenticity.

Meanwhile the dpa news agency reported that investigators were probing statements found on the web that indicated a left-wing motive to punish the club for allegedly not opposing racism strongly enough.

Federal prosecutors have scheduled a statement for 1200 GMT.