Photos of Mark Zuckerberg and Jack Dorsey appear multiple times in a 25-minute video created by a group that calls itself the Sons Caliphate Army.
The images of the two CEOs are sometimes engulfed in flames, or marked with bullet holes.
The video is in response to efforts by Facebook and Twitter to stop terrorist activity on their platforms.
A slide toward the end of the video reads, in English: “To Mark and Jack, founders of Twitter and Facebook / and to their Crusader government / You announce daily that you suspended 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 you [sic] sites, Allah willing, and will know that we say is true.
#Sons_Caliphate_Army” In a separate slide, they also claim to have hacked more than 10,000 Facebook accounts, 150 Facebook groups, and more than 5,000 Twitter accounts.