Sheriff's deputies arrived and checked out cameraman Tyler Shields' footage, which confirmed the drivers' reports.
"Deputy Morgan checked their camera, and discovered numerous photographs of the females hanging, sitting and straddling the bridge," the sheriff's report reads.
Among the actresses arrested were (clockwise from top left) Candice Accola, Kayla Ewell, Sara Canning and Nina Dobrov.
Deputies arrested Shields, 27, and actresses, Nina Dobrev, 20, Sara Canning, 22, Kayla Ewell, 24, Krystal Vayda, 23, and Candice Accola, 22.
The six were booked in the Monroe County jail on charges of disorderly conduct. They have since been released on bond, Selman-Willis said.
Dobrev, Canning and Ewell all live in Atlanta, according to the sheriff's report. Vayda lives in New Jersey. Accola and Shields live in California.
Canning hung up on a reporter Friday afternoon. Dobrev, Ewell, Shields and Vayda did not immediately return phone calls. Accola referred calls to her publicist, who could not be reached for comment.
CW TV spokeswoman Pam Morrison said she had "no information" on the arrests.
But Morrison said the show, which is filmed in Atlanta, had "great ratings" for its debut Thursday.
The show is based on L.J. Smith's novels, "The Vampire Diaries." Kevin Williamson, who produced the "Scream" movies and hit television show "Dawson's Creek," serves as the executive producer.