Prison hunt

The Polish town is situated near Stare Kiejkuty, which is known as a base for Polish intelligence. As a result of these findings, Marty concludes: "The CIA's secret prisons did exist in Poland." According to Human Rights Watch, the suspects were neither officially accused nor sentenced by a court, which means that the prisons must have been illegal.

The plane in question is said to have spent 64 minutes at Szymany airport. Later, it flew to Romania and Morocco, from where it headed to the US with a stop at the Guantanamo base in Cuba. Marty based his conclusions on the transcript of the N313P flight provided by the Czech Republic, Bulgaria, Romania and the EU flight control agency. Marty claims Poland was the only one that refused to provide information on the flight.

"Poland cannot be considered as a country remaining outside the system of prisoners transfer, because it has not presented data that would deny the information that we have from other sources," Marty wrote.

"This is a slander that is not based on any facts," responded Poland's Prime Minister, Kazimierz Marcinkiewicz. "Such prisons have never existed in Poland. Such prisoners have never been here," the former president of Poland, Aleksander Kwaśniewski, told the German Zeit im Bild.

The mysterious story dates back to November last year when The Washington Post ran an article alleging that secret CIA prisons existed in Europe. The article did not mention any particular country.