A man wanted by Essex Police as part of the investigation into the 39 lorry trailer deaths has been arrested at Dublin port.
Police in Ireland say the man, who is in his early 20s and from Northern Ireland, was held over an unrelated outstanding court order and will appear in court this afternoon.
He is understood to be sought by Essex Police as part of their investigation into the deaths of eight women and 31 men found in the refrigerated trailer in an industrial park in Grays in the early hours of Wednesday.
Four other people arrested over the deaths, including a 48-year-old man from Northern Ireland who was detained at Stansted Airport on Friday on suspicion of conspiracy to traffic people and manslaughter, remain in custody.
Officers had earlier arrested a couple, named locally as haulage boss Thomas Maher and his wife Joanna, both 38, of Warrington, on suspicion of 39 counts of manslaughter and people trafficking.
Mo Robinson, 25, from Northern Ireland, the driver of the Scania truck was arrested on suspicion of murder on Wednesday.
He has now been charged with 39 counts of manslaughter and will appear in court on Monday.
In Belgium, police are hunting the driver who delivered the trailer to Zeebrugge, the port it left before arriving in the UK.
Essex Police initially believed the victims were Chinese nationals.
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