In a press conference, Essex Police have said it is too early to tell how the man, who was one of 35 people found in a shipping container in Tilbury Docks, died.
Police Superintendent Trevor Roe said: "In terms of how the individual died, it will be subject to the normal coroner's process. It's too early to tell."
He also said: "We continue to work very closely with UK Border Agency and the Port of Tilbury Police. We are still waiting, because the 35 victims are spread across a number of hospitals, there are language issues, there is a need to bring them to a reception centre. We still don't understand the breakdown of men, women and children within the container, there is still some confusion because of the logistics of the operation."
He said the victims were believed to come from the Indian subcontinent.
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.