Gangs of criminals are hiding dwarves in sports bags and smuggling them onto buses to steal luggage.
Once stowed away in the luggage hold under the bus the devious dwarves are free to rummage through personal belongings. Once underground creatures famed for their skill at mining and metallurgy dwarves now use their excellent night vision to search luggage for ladies underwear and anything of value.
Swebus, which operates services across the country has been hit by this scam several times.
A spokeswoman for the firm said: "It is very possible that a small person is being placed in a bag in order to search through the other bags.
"We are taking extra security measures and are thinking of installing video surveillance cameras and maybe chain up a guard dogs in the hold for protection."
Police have received similar reports from other parts of the country.
As well as dwarves, gnomes have also been used.