London: Police on Friday arrested two more suspects in connection with a large-scale murder investigation launched after the bodies of 39 Chinese nationals were found in the back of a refrigerated lorry container in an Essex industrial park.
A man and woman, residents of Warrington in Cheshire, North West England were detained on suspicion of conspiracy to traffic people and manslaughter.
Earlier, Mo Robinson, a 25-year-old man from Northern Ireland was arrested on suspicion of murder following the discovery on Wednesday and remains in police custody.
Essex police said the bodies of the victims which were found in a container in the Waterglade Industrial Park in Grays, South East England were on Friday being moved to a mortuary in Chelmsford and that postmortem examination would begin later in the day.
According to police, the tractor unit of the lorry traveled from Dublin and arrived at Holyhead Port on Sunday before picking up a trailer that had come from Belgium in Purfleet.
Belgium's Federal Prosecutor's Office said on Thursday it opened a case into the incident saying in a statement an investigation showed the container concerned arrived at Zeebrugge on 22 October at 02.49 pm and left the port the same day during the afternoon to arrive in Purfleet on 23 October at 01.00 am.
"It is not yet clear when the victims were placed in the container and whether this happened in Belgium," the prosecutor's statement added.
The suspect was in custody for questioning in a bid to establish the circumstances surrounding the incident.
The UK's National Crime Agency said it was working to identify criminal groups that could have been involved in the case.
Sources from Bulgaria's foreign ministry said the trailer appeared to be registered in Bulgaria under the name of a company that belonged to an Irish national.
The case has generated a stir in the UK and reopened a debate about the dangers of migration mafias.