"Finding and speaking to the Hughes brothers is crucial to our investigation.''
Gardai are looking to speak to anyone with any information about two Northern Irish brothers wanted in relation to the Essex Lorry tragedy.
Ronan and Christopher Hughes from Co. Armagh are wanted on suspicion of manslaughter and human trafficking.
Essex Police say speaking to the brothers is crucial to their investigation into the deaths of 39 people.
Detective Chief Superintendent Stuart Hooper, who is leading the investigation, said: "Finding and speaking to the Hughes brothers is crucial to our investigation.
"At this time we believe they are in Northern Ireland but they also have links to the Irish Republic.
"If you know where they are or have any information about their whereabouts I need you to call my team.
"This is a case where 39 men and women have tragically died and support from the community is going to be vital to help bring those responsible to justice."