From the New York Times online:
Prosecutors in Munich said the suspects, whom they did not name, were part of a C.I.A. “abduction team” that seized the man, Khaled el-Masri, in Macedonia in late 2003 and flew him to Afghanistan. He was imprisoned there for five months, and has said he was shackled, beaten, and interrogated about his alleged ties to Al Qaeda, before being released without charges.
More at the Times's site.