A car bomb explosion in the eastern Libyan city of Benghazi.
The explosion happened in front of a shopping mall and bank. At least one burned-out UN car could be seen at the scene.
This explodes killed three UN staff members and two other mission members on Saturday, the United Nations said.
The attack came as the warring sides of the country said they accepted a cease-fire proposed by the UN to stop fighting in the capital of Tripoli during an upcoming Muslim holiday.
Health officials said the blast took place outside Arkan Mall in the Hawari neighborhood, where people were gathering for shopping a day before the Eid al-Adha holiday begins. The Benghazi municipal council said the attack targeted a convoy for the UN Support Mission in Libya.
No group immediately claimed responsibility for the attack, which came a month after two bomb-carrying vehicles went off in Benghazi, the stronghold of the Libyan National Army, led by Gen. Khalifa Hifter. The July attack killed at least three people and wounded 33 others.
On Friday, the government in Tripoli said it had accepted a UN proposal for a ceasefire during the holiday. However, it was not clear whether fighting in the capital would actually cease. More than 105,000 people have been displaced during the clashes, according to the United Nations.