A priest has been beheaded and another critically wounded in a terrorist attack at a church in northern France . Greg Palkot reports from London One of the two knife-wielding Islamist attackers who slit the throat of a Catholic priest during a morning Mass in northern France Tuesday was under judicial supervision after trying to travel to Syria twice under false names. The two knife - wielding attackers had pledged allegiance to ISIS , with one being a convicted " electronic tag wearing " terrorist along with his parents . Both the attackers were killed by police at the scene of the crime . French President Francois Hollande said : " We must fight this war by all means , while respecting the rule of law - what makes us a democracy . "
A priest has been beheaded and another critically wounded in a terrorist attack at a church in northern France . The two knife - wielding attackers had pledged allegiance to ISIS , with one being a convicted " electronic tag wearing " terrorist along with his parents . Both the attackers were killed by police at the scene of the crime . French President Francois Hollande said : " We must fight this war by all means , while respecting the rule of law - what makes us a democracy . "