Tests on the body of an immigrant found dead inside a shipping container at Tilbury docks have failed to establish how he died.
The man, who is believed to be in his 40s, was one of 35 people discovered in the container on Saturday.
A statement from Essex Police said inquiries would continue after a post-mortem carried out yesterday proved inconclusive.
Superintendent Trevor Roe said: "Tragically, one man died on the voyage and the investigation into his death is now being led by us.
"These people were found in an awful situation and our main priority is to look after them and ensure they are now safe following what would have been a horrendous ordeal."
The uncle of dead Afghan immigrant Meet Singh Kapoor says he wanted a better life for his children. Instead his children watched him die.
ITV News has spoken to the translator police used after 35 Afghan Sikhs, including 13 children, were found in a boat in Tilbury Docks.
ITV News has obtained exclusive footage of people, believed to be Afghan Sikhs, being released from a shipping container at Tilbury Docks.