A lorry driver is due to appear in court charged over the deaths of 39 people found in a refrigerated trailer in Essex.
Maurice Robinson, 25, of Craigavon in Northern Ireland, is due to appear via videolink at Chelmsford Magistrates’ Court on Monday.
The bodies were found in a trailer in the early hours of Wednesday, on an industrial estate in Grays.
DNA tests are being carried out in Vietnam to help to identify the dead.
Mr Robinson is charged with
counts of manslaughter, conspiracy to traffic people, conspiracy to assist unlawful immigration and money laundering.
Essex Police also confirmed that a man arrested in Dublin by Irish police on Saturday “is a person of interest” in their investigation.
A spokesman said: “We are liaising with the Garda via telephone as this man is currently held outside the jurisdiction of the law of England and Wales.”
Three other people arrested in connection with the deaths were released on bail on Sunday.
Detectives are now working on the largest mass fatality victim identification process in the force’s history.
Initially, police said the victims were Chinese, but a number of Vietnamese families have described how they fear their loved ones are among the dead.
Some of the victims are said to have paid thousands of pounds to guarantee their safe passage to the UK, from where they would be able to carry out work that would give them money to send home.
Reuters reports that the UK government has sent documents to Vietnam’s Ministry of Public Security in a bid to identify four of the 39 victims .
Families in the country have shared their fears their loved ones could be have been among those who died.
Pham Thi Tra My, 26, sent her family a message on Tuesday night, saying her “tr ip to a foreign land has failed “.
Meanwhile Nguyen Dinh Gia said he had not heard from his son Nguyen Dinh Luong, 20, since he told him last week he was trying to join a group to get from Paris to the UK.
Detectives are also investigating claims the lorry could have been part of a convoy of three carrying about 100 people.