A discussion of the timeframe for convening and conducting a meeting of the leaders of the "Normandy format" nations (Ukraine, Germany, France, Russia) must be preceded by a ceasefire in Donbas, the Ukrainian presidential administration said.

"As regards the 'Normandy format' at the level of heads of state and government, this matter is being discussed but the timeframe of its convocation and conduct depends on key factors: a ceasefire must be put in place," deputy head of the administration Kostiantyn Yeliseyev said at a briefing in Kyiv on Friday.

The "Normandy format" operates in various formats, including on the level of experts, he said.

"Even last week 'Normandy-format' consultations were held precisely at the level of experts. So, work continues," the deputy head of the administration said.

Today "the situation in Avdiyivka is key and there has to be a ceasefire," he said. "Only then we can talk about some political matters," he said.