Two cars were set on fire after an explosion near a synagogue in southern France as authorities “step up security” at Jewish institutions. A police officer was injured during the “clear criminal attack” on the Beth Yaacov synagogue in La Grande-Motte. President Emmanuel Macron has vowed to “find the author of this terrorist act and protect places of worship”. Firefighters, police, and the gendermerie arrived at the scene at around 8.40am on Saturday morning. France’s Interior Minister Gerald Darmanin said the incident was “an obviously criminal act”. President Macron wrote on social media: “Th…