Cross-Channel travellers are being warned to stay alert after a Eurotunnel passenger travelling back to the UK found a stowaway in the back seat of her car.
The incident followed the attempted storming of a UK-bound ferry by migrants at the French port of Calais.
The stowaway incident involved Sue Taber, 59, of Shepherdswell in Kent.
She said she believed the stowaway may have gained access to her car when she checked her two dogs in at the pet reception in Calais.
She told BBC Radio Kent: "This boy must have been 18 to 20. I don't know how he managed to fit in the car.
"My dog was going berserk but I thought she was looking for a ball, and I kept feeling somebody or something - somebody now I know - nudge me in the back.
"I immediately called the police because I was more frightened about what he was going to do. I can't believe that it happened."
She added: "All he kept saying was 'I'm an orphan, I'm an orphan'. I told him to get lost and he did."
Police said a man was later detained and passed to immigration officials.
Eurotunnel spokesman John Keefe said today that the company's site at Calais was extremely secure.
But he added: "Everybody travelling through Calais should be vigilant whenever they leave their vehicle."
Eurotunnel and cross-Channel ferry companies said their services were operating normally today.