An Islamic State affiliated group called the Caliphate Cyber Army (CCA) released the names, addresses and email addresses of some 4,000 people from around the world on social media in a "kill list" according the International Business Times.
Those marked for death come from countries including the USA, UK, France, Canada and India. Almost half are reportedly from the USA.
The hackers released the list on the encrypted messaging service Telegram, with the directive "O wolves of the Islamic State, [this is a] very important list, kill them immediately."
The list appears to be random and seems to have been taken from a business networking platform, according to Vocativ.