Migrants who died in lorry ran out of oxygen

The 39 Vietnamese migrants found dead in the back of a refrigerated lorry next to the Dartford Crossing died as a result of lack of oxygen and overheating, provisional investigations show. The bodies, which included a 15-year-old boy, were found on an industrial estate in Grays, Essex, in October last year. A 22-year-old man in Northern Ireland was arrested on Sunday on suspicion of manslaughter.