A CHILLING new ISIS propaganda poster shows US President Donald Trump in chains, dressed in the same orange jumpsuit as so many of their execution victims.

Other twisted videos, uploaded onto the terror group's social media channels, threaten the West with drive-by shootings.

3 Donald Trump appears as an ISIS execution victim in the terror group's latest propaganda poster Credit: Siteintelgroup.com

In the footage, a jihadi dressed in Western-style clothes and a baseball cap, aims a silenced automatic pistol at the driver of a pick-up truck.

The extremists also posted videos of two school-aged boys, one of whom says he dreams of being a suicide bomber for the terror group while the second prays for death to America.

In December, the terror group released a twisted, doctored image of Trump and Israeli leader Benjamin Netanyahu keeling in front of a hooded, Jihadi John-style executioner.

The shocking image, featuring the disupted al-Aqsa mosque, was released as fanatics pledged to carry out lone wolf attacks on US soil in terrifying propaganda pamphlets circulating online.

3 The poster threatens to 'break necks and shed blood'

The latest message comes as the US military sounds a warning that ISIS has still not been completely finished off in Syria.

ISIS forces have all but been destroyed in neighbouring Iraq but Colonel Ryan Dillon, a spokesman for the US-led coalition fighting ISIS, says it still exists in Syria.

He said the regime of Syrian President Bashar al-Assad and its ally Russia have not been totally successful in holding the terrain recaptured from ISIS.

He said: "As we look at ISIS in areas where we are not operating... there have been ISIS elements who have been able to come back and take territory [including in] some neighbourhoods in southern Damascus.

3 Donald Trump recently threatened to pull troops out of Syria Credit: AP:Associated Press

"We've seen ISIS start to resurge in areas west of the Euphrates River."

The US military is closely watching ISIS in Syria and Iraq, where the militants have lost 98 per cent of the land they once held, according to the Pentagon.

Progress, however, has ground to a halt in recent weeks in areas where the US-led coalition is fighting ISIS through the Syrian Democratic Forces due to Turkish military action in the north.

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In January, Turkey launched a bloody operation around Afrin to push Kurdish fighters out of the city.

Many of the Kurdish fighters that had been engaged in anti-ISIS operations have quit that fight to support comrades in Afrin.

Dillon said there had been no significant gains against ISIS since the Kurdish members of the SDF had left.