Police on Monday questioned two of Denmark's most outspoken Muslim leaders over secretly taped comments that appeared to allude to terrorism.
Imam Ahmed Abu Laban and Ahmad Akkari were released without charges after the hour-long interrogation at police headquarters in Copenhagen.
Police declined to comment on the questioning.
Akkari talked about blowing up a moderate Muslim leader, in comments recorded by a French TV journalist with a hidden camera. The recording was made in February at the height of Muslim fury over Prophet Muhammad cartoons that were published in a Danish paper and reprinted by other Western media.
Akkari, a spokesman for the Copenhagen-based Islamic Faith Community, has said he was only joking.