French gendarmes stand guard next to a caravan at Saint-Jorioz camping ground, near Annecy where Saad al-Hilli and his wife Ikbal, from Claygate in Surrey, and her mother Suhaila al-Allaf, who lived in Sweden, were all fatally shot. Photograph: Robert Pratta/Reuters.

A man has been arrested in France in connection with the killings of a British engineer and his family in the Alps. Saad al-Hilli and his(...)