The US authorities have taken control of a classified adverts website used by sex workers to advertise their services.
A notice was posted on Backpage.com's various international front pages late last week to inform visitors.
The site had previously shut down the adult section of its US site, but critics had alleged that prostitution ads had simply moved to other pages.
The authorities claim that some of the adverts were for trafficked sex workers, but such claims are generally hyped up by those campaigning to prohibit adult consensual sex work and rarely amount to any more than a few cases when properly
The US media has also reported that Backpage's co-founder Michael Lacey was arrested last week and his home raided.
The Californian authorities had previously attempted to close Dallas-based Backpage.com in 2016, when the state prosecuted the business's chief executive and two ex-owners - including Mr Lacey - over claims they had committed pimping offences and
generated millions of dollars by hosting sex trade ads. However, the case was dismissed on the grounds that the US's Communications Decency Act said that publishers should not be held responsible for content created solely by their users.
But last month, Congress passed a new law, the Allow States and Victims to Fight Online Sex Trafficking Act (Fosta). It states that websites that facilitate traffickers in advertising the sale of unlawful sex acts should no longer be granted the
It has been reported that President Trump will sign a Senate-approved version of the act into law this week.