In Nyala, the capital of South Darfur, an analyst said the security situation in nearby Kalma camp had worsened since the signing of the Darfur peace deal on 5 May, adding that the worst attacks were taking place at night. A nighttime presence of African Union (AU) soldiers inside the camp was urgently needed, a regional observer said, but so far the cash-strapped peacekeepers were only undertaking daytime patrols.