Chilling images reveal the hellhole prisons where ISIS captives were BURNED ALIVE as the jihadis fled Fallujah

THESE are the scenes of tragic devastation ISIS forces left in their wake after retreating from Fallujah, a former jihadist stronghold.

The once-proud Iraqi city, which lies west of capital Baghdad, has been left a ruined shell, littered with propaganda and rigged with deadly booby traps.

ISIS fighters seized the city in 2014, and the settlement would prove to become a stronghold at the heart of the self-declared Islamic caliphate.

Now, after it was liberated by Iraqi forces on Sunday, Fallujah has slipped out of ISIS' evil grasp and been brought back under government control.

And they may have been driven out, but sick Islamists made sure they left their mark on the ruined city, which has been a battleground since May 22.

The fierce fighting which scarred the city's broad sheets may have stopped, but it still bears all the tragic hallmarks of a war-zone.

Security forces relax in the streets, whilst police comb buildings for traces of left-over explosives, which have been rigged to blow whenever anyone steps foot inside.

After the city's liberation, a controlled explosion tore through one booby-trapped house, which had "five tonnes of ammonium nitrate" ready to blow inside it, according to the federal police.

Chilling findings in the city, such as an ISIS-controlled court and a series of "prisons", hint at the barbaric nature of  Fallujah's former inhabitants.

Security forces came across a prison building here captives were burned alive as retreating ISIS forces razed the city they had been forced to abandon.

Meanwhile, another house of horrors featured a room full of metal cages, which were used to house anyone who disrespected the jihadist's twisted laws.

A discarded marriage document was also spotted lying on the ground, whilst another document said that songs, television programmes and films were banned in the city, where ISIS forces made women cover up completely whenever they left the house.

Most of ISIS' black flags have been torn down, but some still litter the city, with the shredded remains of the evil terror group's emblem still tainting some flagpoles.

Meanwhile, any ISIS logos marked on buildings have been sprayed over, with Iraqi military symbols daubed over the blast-marked walls instead.

Car repair shops in the city had all been converted into bomb factories, where vehicles were rigged with explosives ready to be used in suicide missions.

And many of the slain terrorists behind these atrocities lie decomposing in the streets, which are strewn with rubble from recent coalition-led airstrikes.

Those who escaped shaved their beards and fled elsewhere in the country, leaving a ruined shell of a city in their wake.

But resting security forces know that, as ISIS forces continue to be beaten back, the husks of other devastated cities will need to be prised from their ever-loosening grasp.