French police on Monday detained a couple after their 15-month-old twin daughters died of suspected dehydration, a source close to the investigation said.The couple’s four other children, aged three, four, five and six, were hospitalised with dehydration but were not in life-threatening condition, the source said.The parents alerted emergency services in the northern town of Beuvrages after discovering the twins in their beds, a police source said. Preliminary findings indicate that the...