NICE, France—A man armed with a knife attacked people inside a French church and killed three Thursday, prompting the government to raise its security alert to the maximum level hours before a nationwide coronavirus lockdown.
The attack in Mediterranean city of Nice was the third in two months that French authorities have attributed to Muslim extremists, including the beheading of a teacher who had shown caricatures of the Prophet Muhammad in class after the images were republished by a satirical newspaper targeted in a 2015 attack.
