NOVANEWS
The film was released as America marked 14 years to the day since two jets were flown into the World Trade Centre in New York killing nearly 3,000 people.
The video includes footage of ISIS militants fighting along with a song featuring the lyrics: ‘The soldiers of Allah are ready’.
According to the Mirror, the threats appeared on two Twitter accounts.
It comes just a day after a recording emerged of the leader of Al-Qaeda delivering a sinister message to young Muslim men in the United States and other Western countries, encouraging them to carry out attacks in their home countries.
Terror leader Ayman al-Zawahiri made the call to arms in an audio recording that was posted online on Sunday.
He also urges militant groups across the world to establish a greater unity in their “jihads”.