Ukrainian President Petro Poroshenko vowed on Friday that the Crimean peninsula, which was annexed by Russia in March, would be returned to his country.

Ukrainian President Petro Poroshenko vowed on Friday that the Crimean peninsula, which was annexed by Russia in March, would be returned to his country.

He described the loss of Crimea as a "significant problem" but told an international conference in Kiev: "Crimea will be back together with us, not necessarily... by military means."