ISIS released a video threatening Facebook and Twitter founders Mark Zuckerberg and Jack Dorsey, respectively, over the companies' vows to disable all of the terror group's accounts.
Vocativ first reported finding a 25-minute video believed to have been created by ISIS and posted on Telegram, the instant messaging app. The video opens with an image of Zuckerberg and Dorsey with bullet holes on their faces.
A message on the screen in white text then reads: "You announce daily that you suspend many of our accounts and to you we say, is that all you can do? You are not in our league. If you close one account we will take 10 in return and soon your names will be erased after we delete your sites, Allah willing, and will know that[what] we say is true."
TRENDING: America's most dangerous demographic
Telegram is the social media outlet now used by ISIS to recruit new members, because Facebook and Twitter have earmarked their posts for purge.
Facebook announced it was closing 78 ISIS-tied sites in the days that followed the Paris terror attacks that left 130 dead. Twitter announced earlier this month it was taking down more than 125,000 accounts found to have promoted terrorist-type attacks in recent months, Fox News reported.
The Brookings Institution reported in March 2015 that ISIS supporters could actually have a Twitter presence of more than 46,000 accounts.