Erwan, a young man of 18, has not given any sign of life since a nightclub outing in the evening from Saturday to Sunday in Moncoutant-sur-Sèvre. An investigation was opened by the Parthenay gendarmerie.

“We don’t know where my little brother Erwan has gone,” his sister Chloé wrote on Facebook late Sunday morning. ‘We do not want to be hasty in our conclusions, he may simply be with someone he knows, but we are all worried regardless.’