Gunfire and rioting has also reportedly been witnessed in the Jordanian town of Karak, the hometown of Mr Kasasbeh. Roads have been blocked with makeshift barricades and thick smoke has been seen after locals started to burn tyres. At least one government building has been torched. 

Disgusted protesters took to the streets just hours after the release of a sickening 22-minute-long ISIS video that shows Mr al-Kasabeh being burned alive while he was locked helpless in a cage.

The release of the expertly-edited video - which represents a new level of barbarity from a group notorious for its savagery - has prompted Jordan to announce it would execute all six prisoners convicted of association with ISIS at dawn today, roughly 6.40am (4.40am GMT).

The chilling footage, entitled 'Healing the Believers' Chests', appears to show the captured airman being set alight as the militants, infamous for their barbaric murders, plunged to new depths of depravity.

The footage, filmed from several camera angles, shows the pilot wearing an orange jumpsuit and seemingly doused in fuel, as a trail of petrol leading up to the iron bars of the cage is seen being set ablaze.

Flames are seen quickly spreading across the dirt to the cage where they completely engulf the helpless pilot in images that are far too distressing to publish.

Within an hour of the 22-minute-long video's publication, Jordan reportedly moved six ISIS-linked prisoners to a jail in the south of the country which is usually used for state executions. 

Al-Rishawi is expected to be hanged tomorrow along with five other IS affiliated prisoners.

King Abdullah cut short a visit to the US, before making a statement on Jordanian TV, saying he had received news of the 'martyrdom with sadness and deep sorrow'.

Calling the murder a 'cowardly act of terror', he also pleaded for his countrymen to stand 'side-by-side', vowing that Kasasbeh's death 'would only make us stronger'.

US President Barack Obama says that if the video turns out to be authentic, it would be more evidence of the group's 'viciousness and barbarity.'

He added that the U.S. would 'redouble the vigilance and determination on the part of our global coalition to make sure they are degraded and ultimately defeated,' adding that the footage serves to indicate that 'whatever ideology they are operating out of is bankrupt.'

Prime Minister David Cameron also condemned the 'sickening murder', but said it would only 'strengthen our resolve'.

He said: 'I pay tribute to the dedication and bravery of Lieutenant Moaz al-Kassasbeh, who paid with his life while protecting his country and us all. My thoughts and prayers are with his family tonight at this tragic time.

'These terrorists' brutal behaviour will only strengthen our resolve... We will not stop until these evil extremists and their poisonous ideology are defeated.' 

Following the king’s speech, a photo montage of the Jordanian pilot was shown, accompanied by a melancholic soundtrack of classical music. 

Tomorrow, would-be suicide bomber Sajida al-Rishawi will be executed along with five other jihadists, an official told Afp. 

'The sentence of death pending on... Iraqi Sajida al-Rishawi will be carried out at dawn," the security official said on Tuesday, speaking on condition of anonymity.

Rishawi, the would-be bomber, was condemned to death for her participation in deadly attacks in Amman in 2005, and IS had offered to spare the life of the Jordanian fighter pilot, Lieutenant Maaz al-Kassasbeh, if she were released.

'The death sentence will be carried out on a group of jihadists, starting with Rishawi, as well as Iraqi Al-Qaeda operative Ziad Karbuli and others who attacked Jordan's interests,' the security source said.

'Jordan's response will be earth-shattering," Information Minister Mohammed Momani said earlier on television, while the army and government vowed to avenge the pilot's murder. 

(dailymail.co.uk)