There have also been many attacks on non-military and civilian targets, beginning in earnest in August 2003 and steadily increasing since then. These include the assassination of Iraqis cooperating with the Coalition Provisional Authority and the Governing Council, considered collaborators by the guerrillas, and suicide bombings targeting the United Nations headquarters, the Jordanian Embassy, Shi'a mosques and civilians, the International Red Cross, Kurdish political parties, the president of the Iraqi Governing Council, hotels, Christian churches, diplomats and restaurants. Armed and unarmed Iraqi police and security forces are also targeted, because they are also considered collaborators. Sometimes they are killed in ambushes and sometimes in execution-style killings. Militants have targeted private contractors working for the coalition as well as other non-coalition support personnel.