In the wake of the G20 summit in China Ukrainian MPs addressed the leaders of the participating countries in an official letter 'to immediately take all possible political and diplomatic measures to release all hostages and political prisoners held in temporarily occupied territories of Ukraine (i.e., Donbas and Crimea), as well as in the Russian Federation'.
Ukraine Today: Following footsteps of Savchenko case

The 35-year-old army helicopter pilot, Ukrainian Nadiya Savchenko elected as an Ukrainian MP in absentia during almost two years in a Russian jail, attends a debate at the Parliamentary Assembly of the Council of Europe, in Strasbourg, on June 20, 2016 (Frederick Florin/ AFP)