LONDON — Thirty-five people were found in a shipping container that was being unloaded at a dock east of London on Saturday morning, including a man who was pronounced dead at the scene, law enforcement officials here said.

The survivors, including several children, were taken to local hospitals where they were mainly being treated for hypothermia and dehydration.

Officials said that the members of the group appeared to be Indian, but that they could not immediately confirm their nationalities.

The container had been aboard a commercial ferry that arrived from Zeebrugge, Belgium. It was unloaded at the Tilbury docks in Essex, just east of London. The police said they were investigating how the people came to be locked in the container and what their point of origin had been.