Police are investigating after a man was found with serious head injuries at a property in Birkdale this week.
The man was found in a garage about 4pm on Wednesday and taken to hospital, Detective Senior Sergeant Kim Libby, of Waitemata CIB, said.
He remained in Auckland City Hospital in a critical condition.
Hospital staff told police later that day about the man and initial inquiries by police appeared to indicate the injuries were accidental, Libby said.
"However, as a result of further information received from medical staff this
week, police are now treating the injuries as unexplained," she said.