Four Polish drivers were arrested after 68 suspected illegal immigrants including two pregnant women and 15 children have been found locked in thier cargo containers shipped into Harwich International Port.
The Four Polish lorry drivers were arrested on suspicion of smuggling the migrants into Britain from Holland on the Stena Hollandica super-ferry.
Home Office officials said the group migrants were 53 adults and 15 children included 35 from Afghanistan, 22 from China, 10 from Vietnam and one person from Russia.
Seven of the stowaways were taken to Colchester General Hospital in Essex for treatment after complaining of abdominal pains and chest pains caused by the cramped conditions.
All the suspected illegal immigrants have been assessed and have now been handed to UK Border Force officials.
It later emerged they had been found in trucks full of Polish washing machines.
Experts said they were lucky to be alive and may have been crammed into the container for days with little food or water.
The route between Holland and Harwich has been described as a 'carousel system' for immigrants who come to Britain.
The migrants are deported back to the Netherlands and then they try to sneak back again.
