ISIS barbarians have shot two Egyptian policemen in the head and threatened Israel in a sickening new execution video.

The two men are seen kneeling on the ground before a masked jihadi in the desert of the Sinai peninsula in Egypt.

Gruesome footage then shows the men, who were wearing orange boiler suits, lying in a pool of blood having been shot in the head.

ISIS barbarians have shot two Egyptian policemen in the head and threatened Israel in a sickening new execution video

The two men are seen kneeling on the ground before a masked jihadi in the desert of the Sinai peninsular in Egypt

In the same video, ISIS fanatics in Egypt deliver a rare direct threat to Israel, saying the Jewish state will soon 'pay a high price.'

Egypt's branch of the ISIS is spearheading an insurgency in northern Sinai that had simmered for years but grew stronger and deadlier after the military's 2013 ouster of Mohammed Morsi, an Islamist president whose one year in office proved divisive.

The narrator of the 35-minute video released this week threatens Israel's Jewish population, saying 'your account with us has become weighty and you will soon pay a high price.'

The authenticity of the footage could not immediately be verified, though its contents and production style mirrored previous ISIS propaganda material.

ISIS, which controls large swaths of territory in Iraq and Syria, seldom mentions Israel in its propaganda material.

When it has done so it has often been in the wake of battlefield setbacks, apparently to boost the morale of its fighters and supporters.

Gruesome footage shows the men, who were wearing orange boiler suits, lying in a pool of blood having been shot in the head

ISIS has over the past year lost a string of cities it had captured in Iraq and is now bracing for an assault by US-backed government troops and allied militiamen on Mosul, the country's second largest city, which has been under ISIS control since 2014.

In neighboring Syria, the extremist group is coming under growing pressure, and is fighting on multiple fronts against the Russian-backed Syrian army and its allies, as well as U.S.-backed Kurdish troops.

Military officials with firsthand knowledge of the fighting in Sinai said the latest ISIS video was a little more than a compilation of old footage depicting attacks on the Egyptian army and police in Sinai.

However, the video, which shows roadside bomb attacks, gun battles and sniper fire, offers a glimpse of the scale of fighting there.

In the same video, ISIS fanatics in Egypt deliver a rare direct threat to Israel, saying the Jewish state will soon 'pay a high price'

Egypt's branch of the ISIS is spearheading an insurgency in northern Sinai that had simmered for years but grew stronger and deadlier after the military's 2013 ouster of Mohammed Morsi

Egyptian authorities have all but banned media access to northern Sinai, with the local press relying almost entirely on statements put out by the army and police, briefly reporting on their casualties.

Meanwhile, an anti-terrorism law passed last year places severe restrictions on media coverage of anti-government activity, with heavy fines and up to five years imprisonment prescribed for publishing news that contradicts official statements or the perceived promotion of terrorists' causes.

The latest ISIS video, entitled 'Flames of the Desert,' shows the faces of ISIS fighters killed by Egyptian troops.

The military officials say the militant group edited out the fierce counter-attacks launched by the military following militant attacks.

One example, they said, was the part of the footage showing militants firing at an Apache gunship while triumphantly screaming Allahu Akbar, or God is great.

The aircraft was not hit, and later gunned down and killed most of the militants, added the officials, who spoke on condition of anonymity in line with regulations.