Daesh (ISIS) has killed three Libyan soldiers loyal to the self-declared Tripoli-based government east of Misrata, state news agency LANA reported Sunday.
The militants stormed a military police checkpoint in the town of Bughrain, where they attacked the soldiers with knives.
Daesh has secured strongholds in the North African country, where two rival governments have been fighting for power since the ousting of Muammar Gaddafi.
The extremists seized the city of Sirte after clashes with forces loyal to the internationally recognized government. Daesh has also secured a presence in Derna and Benghazi in the east.
Libya's Western-backed government has been based in the east since the rival government overtook the capital in August.