A Twitter account allegedly belonging to a member of the Islamic State of Iraq and Syria (ISIS) has posted death threats against Twitter employees.

Twitter said it will investigate the ISIS threats.

The tweets have been erased but they have been translated into English.

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The tweet reads: "The time has arrived to respond to Twitter's management by directly attacking their employees and physically assassinating them."

This was posted by a certain @Dawlamoon and the user noted the attack will be due to the "sleeper cells of death".

Another tweet has been translated and it basically says that every Twitter employee in San Francisco should watch out for themselves because there might be a lone wolf assassin waiting at their doorstep.

It's been found out that the @Dawlamoon account belongs to Jerusalem-based militants called the Al Nusra Al Maqdisia. The tweets were released Monday.

It's not yet clear how they're related to ISIS but sources say the group is often mentioned in the forums released by ISIS.

Twitter has taken action about this by suspending the account. The account was said to have over 3,000 followers.

Twitter released a statement saying their security team is now investigating about the truth in the said threats and they are working closely with officials from the law enforcement.

Twitter shut down a couple of ISIS related accounts over the past months. New accounts are being opened every now and then, however.

Sources said the threats were due to "biased" closing of ISIS accounts and accounts of groups related to ISIS.

Twitter closed down the accounts because militants were using the accounts to recruit more members to their murderous group. 

TagsInvestigates, Death Threats from ISIS, Lone Wolf, Assasinate, Threats, San Francisco