Representatives of Minsk Trilateral Contact Group gathered in Belarus for another round of talks.
The issue of possible contamination of drinking water in the militant-held areas of eastern Ukraine will be among the topics for discussion.
Earlier, the mercenaries said they would flood Yunkom, the coal mine near Donetsk. The area is known for having hosted the nuclear probes during the Soviet times.
Ukraine, Russia and the OSCE will also discuss the release of POWs. Besides, Ukraine expects Russia to reply to Kyiv’s offer to exchange Ukrainian political prisoners for 23 Russian citizens who currently serve time in Ukrainian prisons.