The United Nations asked Libyan rival groups to abide by cease-fire.
"For the sake of civilians in Tripoli, hundreds of thousands who have fled their homes and 116,000 children unable to attend their classrooms, the United Nations urges the parties to continue to abide by the declared ceasefire," UNSMIL said on Twitter.
Renegade commander Khalifa Haftar and Fayez al-Sarraj , head of the UN-recognized government, accepted a joint call by Turkish President Recep Tayyip Erdoğan and his Russian counterpart Vladimir Putin for a cease-fire late Saturday.
The cease-fire took effect at midnight local time (2200GMT) on Sunday, and the decision was celebrated with fireworks in Tripoli.
UNSMIL urged the warring sides "to give ongoing diplomatic efforts an opportunity to reach a permanent cessation of military operations and a return to the political process".