One of the men who attacked a Normandy church, killing an 85-year-old priest, twice used relatives' ID cards in attempts to reach Syria, France's anti-terrorism prosecutor has said.
Adel Kermiche, 19, was wearing an electronic surveillance bracelet when he and another attacker slit the throat of a priest in the town of Saint-Etienne-du-Rouvray, Paris prosecutor Francois Molins said.
Kermiche and the other assailant were killed by police.
Mr Molins said the bracelet was deactivated for a few hours every morning, corresponding with the time of the attack.
He said Kermiche was arrested in Germany in March 2015 trying to join extremists in Syria using his brother's ID, and was then arrested in Turkey two months later using a cousin's ID.
Mr Molins said another person who was injured in the attack is no longer in a life-threatening condition.
Earlier, a family friend had said Kermiche was a local youth whose parents flagged his radical behaviour to authorities.
Jonathan Sacarabany said Kermiche grew up in a housing project in Saint-Etienne-du-Rouvray.
Kermiche had a sister who is a doctor in the nearby city of Rouen, and a brother, the family friend said. Their mother is a professor.
The family alerted authorities to his radicalism to try to stop him from going to Syria, Mr Sacarabany said.