UNITED NATIONS (AP) _ The U.N. Security Council voted unanimously Friday to keep U.N. military observers in Liberia to monitor elections next month designed to cement a peace agreement ending eight years of civil war.

The United Nations keeps 92 military observers from 10 countries in Liberia to oversee cease-fires among warring factions.

The 15-0 vote extended the U.N. mission until September 30 with ``the expectation that it will terminate on that date,'' the Security Council resolution said.

On July 19, Liberians vote for Africa's first proportionally representative parliament _ part of a peace plan brokered last November by the Economic Community of West African States.

The civil war, which eventually descended into inter-ethnic violence, ravaged Liberia and left 150,000 dead, mostly civilians.

Some of the warlords who fought in the civil war are now running as candidates in the election.