The United Nations top envoy in Sudan is headed to Dar-es-Salaam, Tanzania, for a one-day meeting with the newly-appointed African Union (AU) mediator for the Darfur peace talks.Jan Pronk, the Secretary-General’s Special Representative for Sudan, will discuss preparations for the forthcoming round of talks with AU mediator Salim Ahmed Salim. The talks, between the Government of Sudan and Darfur’s two rebel groups, are scheduled to start on 10 June in Nigeria’s capital, Abuja. A previous round of talks there stalled in December, and since then the AU has been working to revive negotiations.The UN Mission in Sudan (UNMIS), meanwhile, has reported a number of security related incidents over the past week in Darfur and in southern and eastern Sudan. In one incident on 31 May, suspected members of the rebel Sudan Liberation Army (SLA) detained members conducting a UN mortality survey near Nyala in South Darfur. Their vehicles were searched and staff were interrogated. They were released after three hours, the mission said.