Two more people have been arrested after 39 suspected Chinese migrants were found dead in a lorry in Essex.
The driver of the truck, named locally as 25-year-old Mo Robinson, from Northern Ireland, remains in custody after he was held on suspicion of murder.
Essex Police said on Friday that a man and a woman, both aged 38 and from Warrington, Cheshire, were arrested on suspicion of 39 counts of manslaughter and people trafficking.
An international investigation is under way as post-mortem examinations are due to begin on the bodies found in a refrigerated trailer in Grays in the early hours of Wednesday.
On Thursday evening, the first 11 bodies were moved by a private ambulance with a police escort from the port of Tilbury to Broomfield Hospital in Chelmsford.