Ukraine's President Petro Poroshenko called for a temporary ceasefire in eastern Ukraine to "provide time to seek agreement on a peace plan."
In a statement to security chiefs, Poroshenko said he had set government forces the task of regaining full control of Ukraine's border with Russia this week.
Once this was done, he said, a temporary ceasefire should be observed and efforts made to agree on a peace plan.
More top news
Searing heat surges it's way in, then pouring down as we start July.
It's been a remarkable week for the US President as he enters the final stage of his presidency.
The two brightest planets in the solar system will appear close to collision tonight, an illusion caused by line of sight.