The Ukrainian president Petro Poroshenko has announced a proposal for a unilateral ceasefire, as part of a peace plan.
The truce would allow pro-Russian militants and separatist to lay down their arms and for Russian mercenaries to leave the country.
"The peace plan begins with my order for a unilateral ceasefire," Mr Poroshenko said earlier today.
"We expect that disarmament of military groups and restoration of order will take place right after it."
One of the separatists groups has already rejected the proposal.
Fighting continued in the east of Ukraine, with over 30 militants killed in clashes, according to a government spokesperson.