Polish prosecutors opened an investigation into the alleged mistreatment of al-Nashiri in September in response to the request [JURIST reports] filed by human rights group Open Society Justice Initiative (OSJI) [advocacy website] and al-Nashiri's lawyers. OSJI stated that the filing represents the first attempt by an extraordinary rendition [JURIST news archive] victim to pursue a legal remedy within the Polish court system. The commencement of the investigation came one week after former Polish prime minister Leszek Miller denied any knowledge [JURIST report] of a secret CIA prison in Poland and indicated that he would not discuss allegations of torture until the Polish government's investigation is complete. Earlier this month, lawyers for Guantanamo detainee Abu Zubaydah asked Polish prosecutors [JURIST report] to investigate claims that Zubaydah was abused in the secret CIA prison, hoping Zubaydah's investigation would be done in conjunction with al-Nashiri's investigation. Allegations against Poland were first raised in a June 2007 report [text; JURIST report] to the Council of Europe [official website] by Swiss Senator Dick Marty. The report concluded that numerous European governments had cooperated with the CIA secret prison program. In February 2007, the European Parliament condemned more than a dozen European states [JURIST report] for their roles in the program. Several nations have been accused of obstructing European probes into the secret prison allegations, including Poland [JURIST report], which allegedly housed the largest CIA detention facility in Europe [JURIST report].