A dramatic video has been filmed from inside of a Sydney jail revealing hidden weapons and the alleged use of banned drugs.
A man claiming to be a prisoner at Parklea Correctional Centre has videoed himself showing-off home-made knives and a substance he claims to be the lethal drug ice.
An investigation has been launched into the explosive video after the inmate somehow released the footage to the outside world claiming the prison system in Australia is a "dead set joke"
The inmate claims he was able to make the short film after a mobile phone was smuggled into the jail by prison guards.
He says the jail system is "is killing the young people, the young generation of this place is dead set terrorising."