A group of people reportedly including children has been detained after calling the police for help from the inside of a refrigerated lorry.
Surrey police said officers received the call from people inside the trailer of the vehicle with concerns for their welfare at 3.10pm on Tuesday.
Officers attended junction 11 of the M25 motorway near Chertsey, Surrey, and discovered 13 suspected illegal immigrants inside, the force said. The group included 10 adults and three children, according to local reports.
The group was checked by paramedics and then taken to Dover by immigration enforcement.