Four Libyan militiamen have been killed and more than 20 others injured after a double suicide bombing targeting a checkpoint 50km (31 miles) away from the western village of Abughrein.
The bombers reportedly used a car and a motorbike and are believed to have been members of the so-called Islamic state group.
There was a similar deadly attack last week as the militants expanded the territory they hold in that area to another three villages.
The worry now is that the radical group is edging closer to Misurta, Libya’s third largest city in the west of the country.
The armed forces that are pushing back IS include rival groups from the west, south and east – so there no clear chain of command and none are necessarily controlled by any of Libya’s three rival administrations.