The attack occurred at around 9:25 a.m. local time, 90 kilometers east of Sirte on Saturday.
No individual or group has claimed responsibility for the attack, but Daesh Takfiri terrorists have recently shown increased activity in the south and east of Sirte.
Sirte, located on Libya’s Mediterranean coast and on the line which divides rival militaries in the east and west of Libya, fell to Daesh in 2015 and it was liberated by Libyan forces, dominated by brigades based in the port city of Misrata, in December 2016.
The attack came a day after twin bomb blasts hit a mosque in Libya's second city of Benghazi, killing at least two people and injuring 75 others.
In January, a double car bombing in Benghazi also killed at least 35 outside a mosque in the center of the city as worshipers were leaving evening prayers.
Benghazi is controlled by forces of military strongman Khalifa Haftar, who opposes a UN-backed government based in Tripoli.
Benghazi has been relatively calm since Haftar announced the eastern city's "liberation" from militants in July last year after a three-year campaign. However, sporadic violence has continued.
Libya has been wracked by violence and divisions since dictator Muammar Gaddafi was toppled and killed in a 2011 NATO-backed military invasion. The country has been since split between rival governments and militias.