 ISA agents have sometimes tortured Palestinians in order to recruit them as collaborators.B'Tselem estimates that the ISA annually interrogates between 1,000 and 1,500 Palestinians and uses methods constituting torture against some 85 percent of them, at least 850 persons a year.According to a 2011 report by two Israeli human rights organisations, the Public Committee Against Torture (PCAT) and Physicians for Human Rights (PHR), Israeli doctors fail to report suspected torture and conceal related information, allowing Israeli Security Agency interrogators to use torture against Palestinian detainees.