ROUGH CUT (NO REPORTER NARRATION)br br Pro-Russian separatist rebels in eastern Ukraine released on Saturday (June 28) the remaining four of eight international observers, captured nearly a month ago.br br The rebels had detained a total of eight observers from the Vienna-based Organisation for the Security and Cooperation in Europe (OSCE), a key security and rights body, tasked with monitoring an agreement drafted in Switzerland in April to de-escalate the crisis that has pitted the rebels against leaders in Kiev.br br Four observers including a woman from Germany, and men from Russia, Estonia and Denmark, part of the 100-strong mission, were brought by heavily armed rebels to a hotel in downtown Donetsk, where they were handed over to their colleagues.br br Securing the release of the OSCE hostages has been a part of peace consultations between mediators of the Kiev government, OSCE, Russia and rebel leaders.