Four-year-old Kassim Benouali and his two-year-old brother Sadek died after being overheating in a car during France's heatwave, with their grandmother labelling it a "genuine mistake"

The two children were found unresponsive in the family car on their home driveway in Carpentras, southern France, by their mother, with a manslaughter investigation opened

A three-year-old has been found dead in a car in the Paris region, a police source said on Thursday, the third such fatality of a child during the extreme weather this week.