One of a pair of ISIS knife-men who stormed a church in Normandy before slitting the throat of an elderly priest has been named as known terror threat Adel Kermiche.
The 19-year-old 'ISIS soldier' was being monitored with an electronic ankle tag after he was arrested for attempting to flee France to join the terror group in Syria twice .
Despite having been released early from prison, Keriche's bail conditions allowed him to roam unsupervised between 8.30am and 12.30pm, leaving him free to murder the priest in the attack carried out between 9am and 11am.
Kermiche and his accomplice - also known to French police - forced 84-year-old Father Jacques Hamel to kneel before filming themselves butchering him and performing a 'sermon in Arabic' at the altar of the church in Saint-Etienne-du-Rouvray, according to witnesses.
Both were shot dead by police marksmen as they emerged from the building shouting 'Allahu Akbar' following the attack that also left a nun critically injured.
French President Francois Hollande, who visited the scene today, said the country is now 'at war' with ISIS after the terror group claimed responsibility.