Two men from Northern Ireland remain in custody following the deaths of 39 men and women found in a lorry in England.
UK police arrested three more people yesterday, including a 48-year-old man from the North.
A 25-year-old man from Co Armagh also remains in custody in relation to the deaths.
Officials from Vietnam and China say they're waiting to find out if any of those who died are from those countries.
Essex Police Deputy Chief Constable Pippa Mills says formal identification will take time.
Meanwhile, a Vietnamese community website in the UK has been given around 20 photos of people reported missing by their families since 39 people were found dead in a lorry in Essex.
Viethome says it has handed the photos to police and has asked relatives not to post the images online.
Those reported missing are aged between 15 to 45.
Belgian authorities believe the trailer arrived at Zeebrugge at 2.49 pm on Tuesday and left for Purfleet, Essex, on the same day.
The Belgian public prosecutor's office said it is "not clear" when and where victims entered the container, which is owned by Irish company Global Trailer Rental.