Fifteen people have been arrested on suspicion of immigration offences after being discovered in the back of a lorry in Wiltshire.
The group - all believed to be men aged between 16 and 30 - were discovered in the rear of the vehicle by officers from Wiltshire Police.
Police closed the A350 at the Kington Langley crossroads near Chippenham after a call from the member of the public shortly before 8.30pm on Wednesday.
A man in his fifties from Ireland has also been arrested on suspicion of assisting with illegal entry in the country.
Ambulance service staff carried out initial medical checks on the group and all but one were deemed fit and well and were taken into custody.
One person was taken to the Great Western Hospital in Swindon as a precaution but was later released into custody.
Wiltshire Police said the force was "not clear" about the nationalities of the 15 at this stage.
Superintendent Steve Cox said: "We are working closely with partner agencies as we conduct further enquiries
"I fully understand that recent tragic events elsewhere in the country will mean there will be increased interest and heightened concern regarding this incident."
It comes after eight people were arrested earlier this week by Vietnamese police in connection with the 39 migrants found dead in a lorry in Essex.
They were held on Sunday on suspicion of organising people smuggling overseas.
The 31 men and eight women who were discovered in the back of the refrigerated truck in Grays in October are thought to have been Vietnamese.
So far two people have been charged.