A driver has been arrested after 13 men were found in the back of a lorry in Rugby, Warwickshire.
Police made the discovery while responding to an incident at Mangrove Services on A45 London Road.
Three of the men were taken to hospital suffering heat exhaustion.
The driver has been arrested on suspicion of people trafficking.
The Border Agency has been informed and the remaining men were taken into custody.
Crews arrived to discover 13 patients who had been travelling on the back of a lorry. All of the patients were male, with three of them receiving treatment at the scene for signs of heat exhaustion before they were transferred to University Hospital Coventry and Warwickshire on land ambulances.