An international investigation is under way into a man's death after a shipping container full of immigrants arrived at the British Port of Tilbury.

Police are trying to piece together how the 35 men, women and children came to be in the container, which arrived at the Essex dockyard on a P&O Ferries container ship from Zeebrugge in Belgium this morning.

The group, all thought to be from the Indian subcontinent, were rescued after port authorities heard banging and screaming from inside the container at around 6.30am.

One man died and the others were taken to hospital suffering from hypothermia and dehydration.

Essex Police Superintendent Trevor Roe said that the people were victims of people trafficking.

He said they had been in the container a "significant amount of time."

The police are working with international agencies to establish their movements prior to arriving in the UK.

The occupants of the container are thought to be from Indian states.