NSW inmate transferred after climbing roof

A prisoner who climbed onto the roof of a Sydney jail putting the centre in lockdown has been transferred to another facility.

Operators of Parklea Correction Centre, in the city's northwest, confirmed the prisoner climbed onto facility's roof about 9.30am on Wednesday.

The centre was placed in lockdown and Corrective Services NSW's specialised security operations group were called to manage the situation.

The 25-year-old male inmate was safely removed from the roof about 2.30pm.

He was assessed for lacerations to his leg which he sustained while he climbed onto the structure, a MTC-Broadspectrum spokeswoman said in a statement.

The inmate was placed into segregation before being transferred to another correctional centre, the spokeswoman added.

"The inmate may face internal disciplinary action and criminal charges," she said.

It comes a day after a 25-year-old prisoner allegedly spat on a staff member.

MTC-Broadspectrum said it was the same inmate who is accused of assaulting and threatening staff at Westmead Hospital during a recent hospital escort.

"This inmate will be subject to internal charges and disciplinary action," the spokeswoman said.