The incident in Lyon, a city of about 500,000 people in south west France, occurred a day after a senior government minister warned citizens to brace for more attacks.
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The country was already on high alert following the beheading of school teacher Samuel Paty in Paris two weeks ago and an assault on the Notre-Dame Basilica in Nice on Thursday.
Jihadist Brahim Aouissaoui decapitated a 60-year-old female worshipper, slit the throat of church sexton Vincent Loquès, 55, and stabbed to death 44-year-old mother-of-three Simone Barreto Silva.
The 21-year-old Tunisian repeatedly shouted…