A car bomb explosion in the eastern Libyan city of Benghazi killed two United Nations' staff on Saturday, several medical sources said.
The U.N. is trying to broker a truce for the fighting in the capital Tripoli that started in April.
A Reuters reporter at a Benghazi hospital where casualties of the blast were taken saw a list of names of those killed identifying them as part of the United Nations Libya mission (UNSMIL).
Several medical and security officials at the hospital said two U.N. staff, one of them foreign, had been killed.
UNSMIL spokesman Jean El Alam said via email that the organisation was "in the process of gathering information".
The explosion happened in front of a shopping mall and bank. At least one burned out U.N. car could be seen at the scene.
The LNA has yet to advance beyond the southern suburbs of Tripoli, which is home to the internationally recognised government.
More than 105,000 people have been displaced during the clashes, according to the United Nations.
UNSMIL will be responsible for monitoring any violations, the Tripoli government said.
*This story was edited by Ahram Online.