MOSCOW  The prime minister of Lithuania, a former Soviet republic that broke from Moscow’s orbit and is now a member of NATO, accused the United States on Tuesday of using “Soviet methods” to set up two secret prisons in Lithuania for terrorism suspects.

The prime minister, Andrius Kubilius, said the United States had reached what he contended were clandestine and illegal arrangements with the Lithuanian secret services for prisons that were outside civilian control.

Mr. Kubilius made his remarks on the day that the national security committee in the Lithuanian Parliament released a report that determined that the country was the site of two small secret prisons, though it did not indicate how they were used.

The report was based on testimony from politicians and national security officials. It was initiated after ABC News described Lithuania’s role in hosting so-called black sites, and other questions were raised about its activities in the fight against terrorism.