Nun reveals words of ISIS knifemen who forced elderly priest, 84, to kneel at altar as they slit his throat on camera after invading Mass - before police shot them

Priest had throat cut while another hostage is fighting for life after knifemen burst into Normandy church at 9am
Nun who escaped said killers told her 'You Christians, you kill us' before they killed

Father Jacques Hamel
ISIS claim responsibility for the atrocity while Francois Hollande says France is 'at war' with the terror group
One attacker named as 19-year-old Adel Kermiche, known to police for twice trying to join the terror group in Syria
He was jailed but released on bail - under conditions that allowed him to roam free in the morning and kill the priest
French authorities revealed they arrested a third man, a 16-year-old Saint-Etienne resident, relating to the attack
Nicolas Sarkozy calls for 'merciless' response as ex-PM said 'everything is being done to trigger a war of religions'