Essex police investigating the deaths of 39 people in a lorry last week want to speak to two brothers from Co Armagh.
They say 40-year-old Ronan Hughes and his 34-year-old brother Christopher are wanted on suspicion of manslaughter and human trafficking.
Detectives believe they're in Northern Ireland but they also have links to the Republic.
Yesterday, 25 year old Maurice Robinson of Laurel Drive, Craigavon, Co Armagh was charged with 39 counts of manslaughter.
Gardaí say they continue to assist Essex police with their enquiries in relation to their investigation.