Essex lorry deaths: 39 bodies found in refrigerated trailer - BBC News
Police quiz a man, named locally as Mo Robinson, 25, on suspicion of murder after the discovery.
The vehicle was found shortly before 01:40 BST at Waterglade Industrial Park in Grays, police said.
Essex Police said the trailer has been moved to a secure location where the bodies of those inside - a teenager and 38 adults - can be recovered.
The driver, named locally as Mo Robinson, 25, from Portadown, County Armagh, Northern Ireland, has been arrested on suspicion of murder.
Essex Police said the trailer arrived via ferry from Zeebrugge, Belgium, into Purfleet on the River Thames.
The ship docked in the Thurrock area shortly after 00:30, the force said.
It is believed the lorry then left the port about 35 minutes later.