A spokesman for the PIRC said:
"The Police Investigations and Review Commissioner (PIRC) is undertaking an investigation in relation to the serious injury of a 32-year-old man in Glasgow on 14 June 2017.
"He sustained the injury after being attacked and stabbed following a disturbance outside his home and was taken to the Queen Elizabeth University Hospital for treatment.
"The PIRC investigation will examine the Police Scotland response to a call made just prior to the attack and the police response to previously reported incidents by the victim and a family member.
"The incident has been referred to the PIRC for investigation by Police Scotland and a report on the Commissioner's findings will be submitted to the Chief Constable in due course."
Notes to editors:
PIRC investigators have all the powers of a constable, including:
During the course of an investigation, our staff may: