"A meeting of the working subgroups of the Trilateral Contact Group on the settlement of the situation in the east of Ukraine is being held in Minsk," the report said. As reported, the previous meeting of the Trilateral Contact Group in Minsk was held on June 7. The main issue at the meeting was security. In addition, the Ukrainian side expressed concern about the growing aggression towards the observers of the OSCE Special Monitoring Mission in the territory of Donbas that is not controlled by Ukraine.