Tech giants Facebook, Twitter and Google are facing a federal lawsuit.
And all three companies have been accused of the same thing: knowingly supporting ISIS.
According to court documents, the suit was filed by relatives of several victims who were killed in the 2015 San Bernardino terrorist attack in California.
Fourteen people died and 22 others were wounded.
Authorities said the man and woman behind the attack both pledged allegiance to ISIS in a Facebook post before they were killed in a shootout with police.
This new lawsuit claims Facebook, Twitter and Google allowed ISIS to build a vast online presence and spread extremist beliefs. It claims the terror organization used those platforms to recruit and encourage deadly attacks, like the one in San Bernardino.
The suit says, in part, "ISIS' use of social media directly influenced their actions on the day of the San Bernadino [sic] massacre."
But if the past is any indication, this lawsuit will face an uphill battle in court.
NPR points out similar suits against social media companies have been thrown out because of legislation that says tech companies aren't liable for user postings.