The cease-fire, which President Petro Poroshenko had earlier extended from seven to 10 days, expired at 10 pm local time today.
A few hours earlier, Poroshenko discussed the situation in a phone call with the leaders of Russia, Germany and France, saying the rebels had not "fulfilled the conditions." His office didn't say whether the truce would be extended.
The cease-fire has been continuously broken by both sides, however, and rebels have ignored Poroshenko's demands to lay down weapons and hand back seized border posts.