REUTERS

The ceasefire was called the absolute priority. The heads of state agreed that violations of the ceasefire [in eastern Ukraine] should end, especially near the city of Mariupol, the town of Schastia, Donetsk airport and the village of Shyrokyne in Donetsk region, France's Elysee Palace said in a statement on Thursday.

The four leaders discussed the OSCE's key role in supervising the ceasefire and inspecting the withdrawal of heavy weapons.

"It's very important that [OSCE] monitors could have freedom of action needed to perform their mission, and could deploy new observation points," the statement reads.

Видео дня

The leaders of the four countries also agreed that the four ad hoc subgroups of the Trilateral Contact Group on security, political and economic issues and the issues of internally displaced persons should meet in the coming days.

"This will mark the beginning of the political phase of the implementation of the Minsk agreements," the statement said.