The British couple stopped at a service station on the A29 in Normandy and heard a noise coming from the rooftop luggage box of their car. When they opened it they were astonished to find two young migrants hiding inside, reported France Bleu radio.
It is believed the two – 16-year-olds from Eritrea and Guinea according to the gendarmerie – had targeted the car because of its British plates, believing it would take them over the border and into the UK.
In fact the couple and their children had just arrived in France and were heading to their holiday destination.
A video posted online appears to show the moment the two migrants are discovered in the roof box.
The British couple, along with their two children are clearly shocked and angry when they discover the two teenage migrants and the fact their belongings had been removed from the box.
The family ask for help from a French bystander to call the police as the migrants head off away from the scene.
The tourists told police that they had stayed in Calais overnight after arriving on the Eurotunnel and it is believed that is where the stowaways got into their car.
The two migrants fled but were then caught by local police. As they were minors prosecutors in Dieppe issued a care order, but French media report that social services refused to take them into care so they have now been released.
In order to make room in the luggage box, the men had thrown out items of luggage, so the two tourists filed a complaint for theft.