International Criminal Court Prosecutor Karim Khan has defended his decision to bring war crimes allegations against Israel's prime minister, saying Israel had made 'no real effort' to investigate the allegations itself. ICC judges issued arrest warrants for Israeli Prime Minister Benjamin Netanyahu, former Israeli defence chief Yoav Gallant and Hamas leader Ibrahim Al-Masri last November for alleged war crimes and crimes against humanity during the Gaza conflict. The United States, Israel's main ally, is also not a member of the ICC and Washington has criticised the arrest warrants against Netanyahu and Gallant.