President of Ukraine Petro Poroshenko in a telephone talk with other leaders of 'Normandy Four' states again insisted on liberation of all Ukrainian hostages along with pilot Nadia Savchenko and film director Oleh Sentsov.

"President of Ukraine Petro Poroshenko urged to let go home all Ukrainian hostages, including Nadia Savchenko and Oleh Sentsov, who were illegally detained in Russia," the president's press service reported following the mentioned talk on Wednesday.