STRASBOURG, France — The head of a European investigation into alleged CIA secret prisons in Europe said today there was evidence the United States outsourced torture to other countries and it was likely European governments knew about it.

But Swiss senator Dick Marty said there was no formal evidence so far of the existence of clandestine detention centers in Romania or Poland as alleged by the New York-based Human Rights Watch.

“There is a great deal of coherent, convergent evidence pointing to the existence of a system of ‘relocation’ or ‘outsourcing’ of torture,” Marty said in a report presented to the Council of Europe, the human rights watchdog investigating the alleged secret prisons.

The report said more than 100 terror suspects may have been transferred to countries where they faced torture or ill treatment in recent years.