Since Facebook and Twitter launched a campaign on their social media networking sites to delete material advocating terrorism, many Daesh supporters have moved to other platforms, such as Telegram, where the video threatening Zuckerberg and Dorsey was discovered by Vocativ on Wednesday.
In the 25-minute video, representatives of the terrorist group vow that its hackers will find a way to counter the ongoing wipe of Daesh-related propaganda on social media platforms. The video, heatedly titled "Flames Of The Supporters," features images of the two tech leaders superimposed with bullet holes.
"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," reads text on the video clip. "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 you will know that we say is true."
The video is credited to a person or persons calling themselves "the sons of the Caliphate army," who claim to have hacked over 10,000 Facebook profiles, 150 Facebook groups and 5,000 Twitter accounts.
Daesh is known to use social media to radicalize and lure recruits, as social media websites expand staff to weed out extremists.