A man arrested at Dublin Port on Saturday is a "person of interest" in connection with the deaths of 39 migrants, police confirmed in a statement released on Sunday night.
A spokesperson for Essex Police said: "Essex Police can confirm that a man arrested by the Garda at Dublin Port on Saturday October 26 is a person of interest in our murder investigation regarding the 39 people found dead in a lorry in Purfleet on Wednesday October 23.
"His arrest was for an unconnected matter. We are liaising with the Garda via telephone as this man is currently held outside the jurisdiction of the law of England and Wales."
25-year-old Mo Robinson, from Co Armagh, was charged on Saturday with 39 counts of manslaughter, conspiracy to traffic people, conspiracy to assist unlawful immigration and money laundering.
He is due to appear at Chelmsford Magistrates’ Court on Monday.
Three people arrested by Essex Police investigating the deaths have been released on bail.
A 38-year-old man and a 38-year-old woman from Warrington were arrested in Cheshire on Friday, while a 46-year-old man from Northern Ireland was arrested at Stansted Airport later the same day.
All three had been questioned on suspicion of manslaughter and conspiracy to traffic people.
