A women's anti-violence group has linked the disappearance of several missing young US women to a website where models can network with potential managers and photographers.
The National Women's Coalition Against Violence & Exploitation co-founder said the networking website Model Mayhem was a common denominator in "up to 13 or 14 cases" of missing women.
The group's co-founder, Michelle Bart, said this included Colorado women Kara Nichols, who disappeared in October, and Raven Furlong, who has been missing since February.
Both girls had profiles on the website.
"We're not saying that Model Mayhem is to blame," Ms Bart told the New York Daily News.
"But it's a common denominator.
"They were posing in activity online on a website that most people don't frequent."
Ms Nichols went missing after telling friends she was travelling to Denver for a modelling job on October 9, 2012, and police said they were concerned she had become entrapped by a group posing as a modelling business.
Police believe Ms Furlong ran away from Aurora, Colorado, in February, but her aunt said she found disturbing messages on the young woman's Model Mayhem profile after her disappearance.
"The photographer's asking her to do nude photographs after asking her if she was 18 and her telling them no," she told Fox News affiliate KDVR-TV.
Police have not officially linked the website to either girls' disappearance.
Another Colorado woman, Kelsie Schelling, had a modelling profile on a separate modelling website, Explore Talent, and has been missing since Monday, February 4.
Professional model Jillian Mourning, 25, said she had connected with a "manager" on the Model Mayhem website when she was 19 and was subsequently sexually assaulted during a shoot.
"He came into my room with three guys, and they proceeded to rape me," she said.
"They took pictures of it, and would even show me pictures of things that I was doing, and videotaped the whole thing."
Internet Brands, which owns Model Mayhem, said it cooperated with all police investigations involving people on its site.
"Model Mayhem tries to educate users about scams and how to avoid them," it said.
"The site offers detailed safety advice to help members understand what to look for when they are contacted by others."
Author: Alexandra Pleffer, Approving editor: Mark Worley