Landmark US legal action was filed on Monday accusing several major hotel groups of profiting from sex trafficking on behalf of 13 women who claimed they were sold for sex in hotel rooms.

People talk with each other in snow at Central Park in New York City, the United States, on Feb. 9, 2017. A powerful winter storm brought heavy snow and strong winds to the northeastern U.S. on Thursday, creating treacherous road conditions and leaving schools and businesses closed. (Xinhua/Wang Ying)

Twelve hotel chains were named and accused of knowing and ignoring warning signs that women and children were sold as sex slaves on their premises, according to the filing, a consolidation of 13 existing cases, in US federal court in Columbus, Ohio.

The filing marked the first time the hotel industry - which has long been accused of serving as a breeding ground for sexual exploitation of women and children - faced action as a group.

The case drew together 13 separate actions that had been filed in Ohio, Massachusetts, Georgia, Texas and New York.

Among those named in the 13 cases were Hilton Worldwide Holdings Inc, Red Roof Inn, Intercontinental Hotels & Resorts, Best Western Hotels & Resorts and Wyndham Hotels and Resorts Inc.

Representatives of the hotel groups did not immediately respond to requests for comment.

The milestone case was filed by the New York law firm Weitz & Luxenberg on behalf of 13 women, many of whom were minors when they said the trafficking occurred.

The hotels "derived profit" and "benefited financially" by "providing a marketplace for sex trafficking," the case said, citing "industry-wide failures."

"Such corporate malfeasance has led to a burgeoning of sex trafficking occurring in ... hotels that has reached the level of a nationwide epidemic," it said.

An estimated 400,000 people are believed trapped in modern slavery in the United States, from forced labor to sex trafficking, according to the Global Slavery Index, published by the human rights group Walk Free Foundation.

"This is not one bad apple that need to be dealt with," said Luis CdeBaca, former US anti-trafficking ambassador-at-large.

"The entire barrel has a problem ... For years the hospitality industry has known that sex trafficking and especially child sex trafficking has occurred on their properties and yet it continues to happen."

One of the women in the complaint said she was held captive at age 26 at various locations of Wyndham Hotels for six weeks in 2012.

During her captivity, she said her nose was broken twice, her lip was permanently scarred and her face grew infected from repeated beatings.

"I just wish that people realize how much it really is here in the US," she told Reuters. "It doesn't matter if it's a shady hotel or a nice hotel, it's going on in all of them."


Newspaper headline: Top hotels sued for ‘industry-wide failures’ to prevent US sex trafficking