The U.N. says nearly 10,000 people have been killed and more than 20,000 injured since the Ukraine conflict begin in April 2014.

Assistant Secretary General for Political Affairs Taye-Brook Zerihoun told the Security Council on Thursday that the total number of casualties now stands at 30,729 including 9,333 people killed and 21,396 injured.

He said the latest incident occurred on April 27 when shelling killed at least four civilians and injured at least eight people in Olenivka near the city of Donetsk.

Zerihoun said that fighting has escalated in recent weeks to levels not seen since August 2014, when it was at its most intense and he called on all parties to cease hostilities.

Thursday's Security Council meeting was the first to address the situation in Ukraine since December 2015.