Two people have been arrested on suspicion of the manslaughter of 39 people found dead in a refrigerated lorry in Essex.
A man and woman, both 38, from Warrington, Cheshire, were taken into custody on suspicion of conspiracy to traffic. Earlier, Essex police had arrested a lorry driver. Detectives are still questioning the lorry driver on suspicion of murder.
39 bodies - 31 men and eight women – found inside the refrigerated lorry are believed to be Chinese. They were found at an industrial estate in Grays at 01:40 BST on Wednesday.
Essex Police has been given extra time to question driver Mo Robinson, of County Armagh in Northern Ireland, who was arrested on Wednesday.
Post-mortem examinations are due to start later after the first 11 bodies were moved from Tilbury Port to Broomfield Hospital in Chelmsford.
The trailer arrived in Purfleet on the River Thames from Zeebrugge in Belgium on Wednesday. It left the port shortly after 01:05 the same day and the bodies were found in the trailer at Waterglade Industrial Park about 30 minutes later.