At least 8 people were killed, seven of whom were children after a missile hit a residential building in the Benghazi Province in eastern Libya on Thursday.
The attack came two days after of previous attacks for which ISIS had claimed responsibility.
No one claimed responsibility for the latest attack, Reuters reported Thursday.
However, ISIS, which partially controls the coastal city of Derna in the eastern of Libya, claimed responsibility for the previous mortar attack on the port city of Benghazi on Tuesday via their Twitter account.
Four children were killed and 11 wounded in that attack.
Libyan rebels toppled Libyan President Muammar Gaddafi in 2011, but since then another conflict has arisen in Libya between the rebels and different tribes over regional and political disputes.
The Zintan militias, controlled by the House of Representatives (HoR) assembly in Tobruk and led by ex-general Khalifa Haftar, have launched attacks on Benghazi since October 2014 and reportedly regained some districts of the city.