On May 4, 2011, International Criminal Court (ICC) Chief Prosecutor Luis Moreno-Ocampo announced that an investigation had uncovered enough evidence to allow him to pursue warrants for Libyan leaders for war crimes and crimes against humanity. In March 2011, the ICC launched an investigation which ultimately revealed that former Libyan leader Muammar Gadaffi made plans to attack civilians in response to protests sweeping across the country. The investigation stated that Libyan leaders hired mercenaries as early as January 2011 in anticipation of public protests. Moreno-Ocampo also claimed to have uncovered evidence of the use of "cluster munitions, multiple rocket launchers and mortars, and other forms of heavy weaponry, in crowded urban areas. The ICC is currently embroiled in attempts to extradite Gadaffi's son, Saif al-Islam Gaddafi.