Police were called at 10:10am this morning, Wednesday 22 July, to reports that a group of men had fled from a lorry on the A14 at Newmarket on the junction with the A142.
Witnesses have described a group of 20 or more black men exiting the lorry and leaving the scene. A search of the area is now underway, involving police officers and the National Police Helicopter.
Seven men were detained at the scene and a further three were detained in Exning. All are being taken to Bury St Edmunds Police Investigation Centre for questioning.
The UK Border Agency will be notified.
Any witnesses to this incident are asked to contact Suffolk Police on 101 quoting CAD number 124 of July 22nd.