A man who allegedly stalked Australian pop star Natalie Imbruglia, 29, has been deemed too mentally ill to be interviewed by police, it has emerged.
Imbruglia presented at this year's Mobo awards
The 44-year-old fan was arrested after turning up on the doorstep of the singer's £2m home in Berkshire.
Police arrested the man and detained him under the mental health act after the incident on 1 November.
But he did not return to Windsor police station on Tuesday "because he was deemed unfit to be interviewed".
The man is believed to have flown to London from Australia.
Neighbours reported seeing a man carrying suitcases and a guitar in the vicinity of Imbruglia's home on White Lilies island, near Windsor.
Imbruglia's husband, singer Daniel Johns, called police after CCTV cameras spotted the man approaching the house.
Former Neighbours star Imbruglia, whose hits include the chart-topping single Torn, is believed to have said she was "freaked out" by the incident.
The man was arrested and instructed to report back on bail to Windsor police station on Tuesday, but did not keep the appointment.
After police liaised with doctors at the hospital where the man is being held, it was decided he should not attend the police station.
"He did not answer bail yesterday because he was deemed unfit to be interviewed," said police spokeswoman Anamika Madar.
"He remains in the care of the local health authority. It is not known at this stage when he will be answering bail."