Indonesia Police Watch (IPW) says the National Police Detachment 88 (Densus 88) antiterrorist unit has "borrowed" several terrorist convicts from prison but has not provided any information on their current whereabouts.

"The borrowed terrorist convicts have not been returned to their prison and we also don't know their fate," IPW chairman Neta S Pane said Tuesday as quoted by tribunnews.com.

Among the terrorist convicts removed from prison by Densus 88 are Nur Affifudin, Abdul Muis, Lilik Purnomo, Zuhroni, Ainul Bahri, Utomo Pamungkas, Azis Mustofa, Taufiq Masduki and Ali Imron.

Ali Imron, for example, was removed from prison by the antiterrorism unit in July this year, but his whereabouts remains unknown, Neta said. He urged the police to publicly announce the status of the "borrowed" convicts.