The 39 people found dead in a truck container in Essex, east of London, Police have confirmed all 39 of the victims were believed to be Chinese nationals. Eight of them were women and 31 were men.
previously reported one of the victims was a teenager, but have since clarified she may have been "a young adult woman".
They said a 25-year-old man — locally identified on Wednesday as Mo Robinson from Northern Ireland, who was the driver of the truck — remains in custody on suspicion of murder.
Essex Police said in a statement: "Our detectives worked with partners to conduct initial enquiries into these tragic deaths and we continue to work diligently to piece together the circumstances of this horrific event, which has led to the largest murder investigation in our force's history.