Vigils and rallies are being held after a school teacher was beheaded outside his school in Paris. Samuel Paty, a French history and geography teacher, was killed on Friday by an Islamic terrorist because he showed his students caricatures depicting the prophet Muhammad that were published by Charlie Hebdo in 2015. It caps a bleak weekend for the French capital, which is now among a number of cities now subject to a nightly curfew, after the country hit a new high of more than 32,000 COVID-19 cases in a single day on Saturday. Paris correspondent Hugh Schofield speaks to Susie Ferguson.