Come clean on secret CIA prisons

"We say in all friendship to the United States, 'What is this? You can't be satisfied with all these rumours and neither are we,'" Moeller was quoted telling Danish news agency Ritzau after a meeting of European foreign ministers in Brussels.

Washington has refused to confirm or deny press reports about the Central Intelligence Agency's use of European airports to transfer suspected Islamic extremists around the globe, and so-called "black site" covert prisons in eastern Europe, Afghanistan, Thailand and elsewhere.

"We say (to the Americans): A lot of countries have been named in relation to these overflights, and we can guess at a lot of others in connection with these prisons. So we would like you to tell us something about it," he said.

British Foreign Minister Jack Straw, whose country currently holds the rotating EU presidency, did not mention any formal demand to the United States about the matter, the news agency said.