Human rights groups claim the CIA outsourced torture of detainees to countries where it is permitted.
The Council of Europe estimated in 2007 that 1245 CIA-operated flights had passed over the continent, but an accurate count may be impossible.
The human rights groups said they had identified 54 US-registered aircraft believed to be involved. They submitted freedom of information requests to 28 mostly European countries, as well as air traffic regulator Eurocontrol, for data on the planes' movements.
Along with the US, Denmark, Finland, Germany, Ireland, Lithuania and Norway released the information. Britain, Bulgaria, the Czech Republic, Estonia and Slovenia said they did not have it. The groups have not received a reply from Albania, Austria, Azerbaijan, Cape Verde, Georgia, France, Iceland, Italy, Latvia, Romania, Russia, Spain and Turkey. Canada, Portugal and Sweden declined to release the information, as did Brussels-based Eurocontrol.
- AP