The soldiers - one of whom was reportedly a colonel - are then shot in the back of the head by the “jihadists”, understood to belong to the ISIS-affiliate Ansar Al Sharia, Mail Online reports.

One report said the men were accused of fighting for General Khalifa Hifter, who has been leading an offensive against ISIS for the internationally recognized Libyan government. 

The shootings are the latest in a disturbing rise of executions in Libya in the wake of the terror group's advance across the North African coast.

It has now gained control of a number of Libyan coastal towns including Benghazi, Sirte, Derna and Nofilia.

Last month, the terrorists filmed the bloody executions of 21 Egyptian Christians on a beach in Libya as it seeks to take a stranglehold on the region. 

ISIS also claimed responsibility for a series of suicide bombings that killed at least 45 people in the town of Qubba, around 20 miles from Derna, nearly three weeks ago.

The extremist organisation's deadly grip now stretches across the Middle East and into northern-Africa where today, only the Mediterranean Sea separates the militants from Europe.

It has presence in Iraq, Syria and recently Libya while building a terrifying support structure in Turkey, Yemen, Saudi Arabia, Egypt's Sinai Province, Afghanistan, Tunisia and Algeria.

And over the weekend, Nigerian terror group Boko Haram also pledged its allegiance to ISIS, stretching its influence across the west Africa.