Supporters of the Islamic State (ISIS) released a video that threatened Facebook CEO Mark Zuckerberg and Twitter CEO Jack Dorsey for their efforts in closing down ISIS-related accounts on their respective social media platforms.
The video was released by a group named "the sons of the Caliphate army" in which the photos of the two are riddled with bullets, according to USA Today.
Vocativ's deep web analysts discovered the video on the social media site Telegram, which is frequented by ISIS.
The video titled "Flames of the Supporters" ends with threats to Zuckerberg and Dorsey.
"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 we say is true," the text on the video read, Vocativ reported.
The video is available online.
It showed hackers changing profile accounts and posting ISIS propaganda. They claimed that they have hacked more than 10,000 Facebook accounts, more than 150 Facebook groups and more than 5,000 Twitter accounts.
"Many of these accounts have been given to supporters," the video says.
Social media companies are under pressure to close down accounts used by ISIS in its propaganda to recruit members.
"We don't want people doing that kind of stuff on Facebook," Zuckerberg said at the Mobile World Congress in Barcelona this week.
He added, "If we have opportunities to basically work with governments and folks to make sure that there aren't terrorist attacks then we're going to take those opportunities and we feel a pretty strong responsibility to help make sure that society is safe."
Twitter recently announced that it has suspended 125,000 accounts related to ISIS in the past six months. The strategy is working, according to a George Washington University study.
However, Veryan Khan, editorial director at the Terrorism Research and Analysis Consortium, said "the bounce back for the Islamic State will be fairly effortless."
"The Islamic State has been preparing their sympathisers for this type of event. Loads of Just Paste Its and Dump To bins as well as 'how to' videos have been circulating over this month on how to create dozens of backup accounts easily including creating false working phone numbers for those using Tor," she said.
In 2014, Twitter received death threats after it started cracking down on terrorists.
