President calls for worldwide campaign to pressure Russia to release all Ukrainian hostages

"I also feel obliged to mention the names of Nadiya Savchenko, Oleg Sentsov, Oleksandr Kolchenko and many other Ukrainians, political prisoners of the Kremlin, illegally detained and sentenced," the President said in his speech at the General Debate of the UN General Assembly. "We will be able to achieve our goal only if our action is global," Poroshenko added.