Sick ISIS savages execute captive by drowning him in FISH TANK in horrific new video

ISIS jihadis drowned a man in a fish tank in the death cult's latest sick execution video.

The man – who is accused of being a spy – has his head shaved and is dressed in a Guantanamo Bay-style orange boiler suit.

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He is forced to confess to his “crimes” in front of the camera before being led away by black-clad, masked extremists.

The prisoner is forced to watch as one of the terrorists fills up the fish tank with water in front of him.

The executioner then grabs him by the back of the neck and dunks his head in the water.

Rather than letting him die, the jihadi allows him up just as he begins to run out of breath.

But there is no reprieve.

The fanatic pours what looks like whiskey or some other liquor over his victim’s head in a bizarre twist before forcing his head under the water again – this time holding him there until he stops moving.

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ISIS savages execute four 'spies' on a crucifix and throw 'gay man' from rooftop as they face oblivion in Iraqi city of Mosul

ISIS has been upping the ante with its brutal propaganda since coming under intense pressure on the battlefield.

The group dissolved 25 people in acid in Mosul in May last year as Iraqi forces began to close in on the city.

As the army began its assault in October, jihadis drowned some 50 people after accusing them of helping the enemy.

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The militants are fighting a desperate battle against the Iraqi army and its allies, who are now making their way through the city, street by street.

The latest ISIS execution video also showed drone footage of suicide car bombers driving their explosives-laden vehicles into the advancing troops.

Tens of thousands of Iraqi forces are currently involved in the offensive to retake Mosul – the main northern city which is also Isis's last major stronghold in Iraq.

Isis has lost more than half of the territory it once controlled in the country and the loss of Mosul would deal a major blow to the caliphate it proclaimed there in June 2014.

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