Ten men suspected of being illegal immigrants were detained after getting out of a lorry in Hadleigh.
Police were called to Ipswich Road shortly before 11am on Monday after the men were seen leaving the back of the vehicle.
They then started walking along the A1071.
A Suffolk Police spokeswoman said the force helicopter had been deployed and all the men had been detained.
Half the group were taken to Bury St Edmunds Police Investigation Centre and the other half to the investigation centre in Martlesham.
Immigration services have been notified of the incident and are to speak with those involved.