Avon and Somerset Police say they have stopped a lorry containing 20 people suffering from possible dehydration.
The vehicle was stopped at a service station off the A303 at Southfields roundabout near Ilminster, Somerset at about 1pm.
"Their health and welfare is paramount as we try to piece together with the immigration authorities exactly what has happened," a police statement said.
More top news
Taxpayers will need to contribute "a bit more" in order to support a £20.5 billion-a-year boost to the NHS budget, the PM has announced.
The backroom staff were on hand with insect repellent to help with the problem in Volgograd.
The former attorney general says he hopes a ‘sensible compromise’ is still possible ahead of a crucial Commons vote.