Hollywood’s tour bus companies aren’t just happily ferrying visitors around Tinsel Town’s sights. The battling has grown fierce and one claims it has been double-crossed.

CitySights L.A., a subsidiary of a New York company, came to town earlier this year with a fleet of double-decker buses to challenge Starline Tours, the oldest and biggest tour line in the city. Yellow-shirted CitySights employees began selling tickets on Hollywood Boulevard east of Highland Avenue, near the Hollywood Wax Museum, while Starline’s blue-shirted employees stayed in their higher-traffic area west of Highland, near Grauman’s Chinese Theatre and the Hollywood & Highland Center.

But in a lawsuit, CitySights claimed it subleased property west of Highland belonging to a third tour company, Top Tour & Limo Inc., where it has the right to sell tickets. CitySights claims the agreement grants Top Tour a commission when CitySights tickets are sold. In court documents, CitySights claims the agreement was part oral contract and attached a semilegible contract scribbled on lined paper.

Starline allegedly convinced Top Tour to switch partners and to lease its space to Starline instead. CitySights, suddenly elbowed out, has filed a breach-of-contract lawsuit against Top Tour.

Starline Chairman Kamrouz Farhadi, in a statement relayed through a company spokesman, said:

“Starline Tours is the oldest and largest tour company in Los Angeles, so we are naturally the first company that people want to partner with, and our long history on Hollywood Boulevard and our longstanding relationships with the businesses in Hollywood stand us in good stead. Business is business, and we have been in business a very long time.”

CitySights and Top Tour did not return calls for comment.