Pro-Russian militants in eastern Ukraine have released the 4 remaining European monitors they detained last month.
The observers from the Organization for Security and Cooperation in Europe were freed on Saturday. Four others had already been released.
European Union officials had asked Russian leaders to use their influence to convince the militants to free all of the monitors by Monday.
Swiss President Didier Burkhalter welcomed the monitors' release. Switzerland currently chairs the OSCE.
He said the organization will continue its monitoring activities to help achieve the goals of Ukrainian President Petro Poroshenko's peace plan.
Poroshenko declared a weeklong ceasefire as part of his bid for peace. He has extended it by 3 days, until Monday.
But there have been reports of sporadic fighting between Ukrainian military forces and pro-Russian activists.
Two Ukrainian soldiers were reportedly killed on Saturday in an attack on a military post. And 2 other people reportedly died in a separate attack on a bus carrying evacuees.
Jun. 29, 2014 - Updated 05:16 UTC