A woman and her two young children have been rescued from the back of a refrigerated lorry, having apparently been in there for three days.
Police were called to the Cambridge Services on the A14 at about 16:00 BST on Thursday after concerns were raised a family might be in the lorry, which was carrying a cargo of grapes.
Officers said the family, who had travelled across Europe, were unharmed.
They are now with immigration services, Cambridgeshire Police said.
No arrests have been made.
The grapes were unloaded to ensure no-one else was inside the lorry.