The brother of Australian cricketer Usman Khawaja has been arrested here in relation to a fake terror "hit list", police said on Tuesday.
"The man was taken to Parramatta Police Area Command where he was spoken in to regarding the alleged offences of attempt to pervert justice, and forgery - making a false document".
"The arrest relates to documents allegedly found on University of NSW grounds in August this year containing plans to facilitate terrorism attacks", a police media statement said.
The Sri Lankan-born PhD student spent a month in solitary confinement at a remote super-secure prison, where he was questioned about targets, not just including Australia's then leader, but reportedly the Sydney Harbour Bridge and the city's iconic Opera House.
But the case fell apart when handwriting experts were unable to link the writing in the notebook to Nizamdeen, and in October the charges were dropped.
Ten Daily is reporting he is Arsalan Khawaja, the brother of Australian cricket star Usman Khawaja.
The 39-year-old is also required to report to Parramatta police station three times a week and is barred from contacting people who may be called as witnesses, with his next court date set for 12 February.
Police have now arrested Arsalan Khawaja, and will allege that the creation of the notebook was related to a "personal grievance" between him and Nizamdeen over a woman.
Australian Cricketer's Brother Arrested Over Fake Terror 'Hit List'
The police had accused him of planning the high-profile attack in a list which included the former Australian Prime Minister Malcolm Turnbull.
Willing confirmed there is no ongoing threat to the community.
Nizamdeen's exact relationship with Khawaja has not been stated by police.
"Out of respect for the process it'd be inappropriate for me to make any further comments", he said on Tuesday while preparing for Australia's first Test against India in Adelaide.
On Tuesday, New South Wales police expressed "regret" for Mr Nizamdeen's experience.
He says they've always been determined to get to the bottom of the matter and "today's arrest is the culmination of that".
"We feel very sorry for him and what has happened to him", Assistant Commissioner Mick Willing said.More news: Verizon, Samsung to release 5G smartphones in USA in 2019