A subgroup for economic issues as a part of the Contact Group which mediates the conflict in Donbas has discussed problems with water supplies and railway carriages in certain districts of Donetsk and Luhansk regions, Organization for Security and Co-operation in Europe (OSCE) Special Envoy Martin Sajdik said.

"The parties covered water supply issues, restructuring of a system of railway shipping and issue of payments. A work of the international expert for organization of restoration of destroyed infrastructure in Donetsk region was positively estimated," the envoy said.

According to him, difficulties with restoration of the destroyed infrastructure in Donbas appear because of the security problems.