Digital rights campaigners are starting a legal challenge to a US law that seeks to fight online sex trafficking.

The Electronic Frontier Foundation (EFF) says the "poorly written" law can hinder attempts to help victims and prosecute traffickers.

The Fight Online Sex Trafficking Act (Fosta) also trespasses on free speech laws, claims the lawsuit.

The EFF wants the law declared unconstitutional to stop it being enforced.

https://www.bbc.com/news/technology-44655768