The chief prosecutor at the International Criminal Court has said he will continue to push for Sudan's leader to be charged with war crimes.
Luis Moreno Ocampo said there was strong evidence that President Omar al-Bashir was behind attacks on civilians in Sudan's Darfur province.
The Sudanese government has rejected the allegations, saying the ICC's case threatens peace efforts in Darfur.
Mr Moreno Ocampo said he accepted that the case posed an international challenge.
