Eight foreign stowaways were found hiding in a lorry heading for Aberdeen, the UK Border Agency has said.
Five Iranians and three Vietnamese were discovered when officers stopped the Hungarian-registered lorry in Calais.
They were able to spot heartbeats coming from within the truck by using detectors.
The stowaways were fingerprinted and photographed before being refused entry to the UK and being handed over to police.
UK Border Agency regional director Carole Upshall said: "This discovery shows how the UK Border Agency's strong presence, not only in the UK but also in northern France, helps protect the whole country from people illegally entering the UK.
"As well as using heartbeat detectors, we use sniffer dogs and carbon dioxide probes to find people hiding in vehicles."