The Tunisian ambassador to the United Nations has called for a Security Council resolution that would send monitors to support Libya's ceasefire.

Tarek Ladeb, who this month holds the council presidency, said the Libyan ceasefire agreed in October had momentum, but was still fragile.

Last week, the UN Secretary-General Antonio Guterres asked for a monitoring group made up of civilians and retired soldiers from the African Union, European Union and Arab League.

Under the ceasefire deal, all foreign forces in Libya are to leave by 23 January, three months after the agreement was signed.

Their departure would be monitored by international observers.