A Muslim extremist has been dubbed 'The Carver' after being blamed for an alleged stomach-churning attack on a fellow prisoner behind bars.

The Carver, who is considered to be one of the state's most dangerous prisoners, has been accused of slicing 'E4E' into the forehead of another criminal in a gruesome 20-minute late night attack.

The alleged offender reportedly poured boiling hot water over the prisoner's body and severed the Islamic symbol - which stands for 'an eye for an eye', into the skin, according to The Australian.

A Muslim extremist who allegedly carved 'E4E' on a prisoner's head during 20-minute ISIS style attack on Michael O'Keefe (pictured) might be person behind horrific whipping attack

Donned 'The Carver', the prisoner allegedly engraved 'E4E' into inmate's head behind bars and is alleged to be behind violent Islamic-style whipping of Sameh Bayda (pictured) late last year

The alleged offender reportedly poured boiling hot water over a prisoner's body and severed the Islamic symbol - which stands for 'an eye for an eye', into the skin at Kempsey jail (pictured)

A razor blade was reportedly used to etch 'E4E' into the front and back of Michael O'Keefe's head, a former Australia soldier, before pouring boiling hot water over him in 2016.

The grim slogan, which was engraved into a prisoner's head at Mid North Coast Correctional Centre, in Kempsy, New South Wales two years ago, is often used by ISIS fighters as a form of punishment.

Now authorities are investigating whether The Carver is the person behind the Sharia whipping of a different inmate late last year.

Accused terrorist Sameh Bayda, who was arrested in 2016, and The Carver were cell mates in Australia's most secure prison when the brutal whipping occurred.

Bayda was allegedly whipped by an electrical cord in an Islamic-style punishment at the Goulburn Correctional Centre.

The accused terrorist was arrested alongside his wife, Alo-Bridget Namoa - who were known as Islam's 'Bonnie and Clyde' - for planning a public stabbing terrorist attack.

The 21-year-old criminal stopped praying and shunned Muslim faith, making him an outcast among extremist inmates, a source told the publication.