A man has been arrested on suspicion of manslaughter in connection with the deaths of 39 people in a lorry trailer in Essex.
Police detained the 36-year-old from Purfleet on Monday morning at a property in Dalston, east London.
He was detained on conspiracy to traffic people, conspiracy to assist unlawful immigration, as well as suspicion of manslaughter.
The bodies of 39 men, women and teenagers were found in a trailer in Grays on 23 October.
All the victims – 31 males and eight females – were later identified as being from Vietnam, with the youngest being two boys aged 15.
Lorry driver Maurice Robinson, 25, pleaded guilty to plotting to assist illegal immigration on Monday.
Christopher Kennedy, 23, and five others were also arrested in connection with the investigation.
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Eamonn Harrison, 22, from Mayobridge, Northern Ireland, is in custody in Dublin and is awaiting extradition to the UK after a European Arrest Warrant was issued.