The Bucks County District Attorney's Office originally filed suit against companies including TikTok, YouTube, Facebook, and Snapchat. District Attorney Joe Khan said the problem of harmful online platforms has not improved and continues to worsen.
"If you put our children in harms way were coming for you," Khan said.
County officials said the expanded lawsuit alleges the companies use practices that keep children engaged on their platforms.
RELATED: Bucks County joins national lawsuit against tech, social media giants
"These companies, at a minimum, should stop using unfair, deceptive, and misleading business practices to get and keep our kids hooked on their platforms," Khan said.
The lawsuit expansion comes as 32-year-old Alec Magill, of Upper Southampton Township, was sentenced Friday for posing as a teen on Roblox and exploiting a 13-year-old in Tennessee and a 16-year-old girl in North Carolina.
Khan said the case highlighted concerns about safety measures on the gaming platform.
"Magill was able to exploit Roblox's completely lax parental notifications, their failure to implement adequate age verification features, and the addictive nature of the gameplay experience itself," Khan said.
County officials also said the lawsuit makes Bucks County the first in the nation to sue X. They allege the platform and its built-in artificial intelligence chatbot lack sufficient child safety precautions.
RELATED: South Jersey family sues Roblox, Discord alleging child sexploitation on the social platforms
According to the district attorney's office, one person in Bucks County has been charged with using the platform to create AI-generated child pornography, while other cases remain under investigation.
"These social media companies can and should do more to ensure their products are not used for a back door for predators," Khan said.
Officials said that since the original lawsuit was filed, some platforms named in the litigation have acknowledged wrongdoing and reached settlements, though not with Bucks County.
"We should have known the risks, but we didn't, so now we will look forward to preventing such failures," said Diane M. Ellis-Marseglia, chair of the Bucks County Board of Commissioners.
County officials said they hope other counties across the country will pursue similar legal action and use comparable tools to protect children online.
Action News reached out to the technology companies named in the lawsuit and had not yet received responses.