A cease-fire due to be signed Friday by the Ugandan government and rebels to end an 18-year war in the north of the country has been postponed.

The delay was announced as negotiators on both sides tried to hammer out unresolved parts of the proposed cease-fire agreement during meetings in the northern district of Kitgum, near the Sudanese border.

A new date for its signing has not been decided.

The chief mediator for the Ugandan government, Betty Bigombe, said Thursday the agreement could clear the way for formal negotiations on ending the conflict.

The northern-based Lord's Resistance Army has fought to overthrow the Ugandan government since 1987, displacing more than one million people.  Its rebels are notorious for attacking civilians and kidnapping children.

Some information for this report provided by AFP, Reuters.