Seven News can reveal Mr Turnbull was one of several members of Parliament, alongside Julie Bishop and former MP Bronwyn Bishop, allegedly targeted in a diary kept by 25-year-old Sri Lankan national Mohamed Kamer Nilar Nizamdeen.

Police were tipped off by a colleague of Nizamdeen’s at the University of New South Wales after the discovery of the diary on Thursday.

View photos Sri Lankan man Mohamed Kamer Nilar Nizamdeen allegedly planned to target former Prime Minister Malcolm Turnbull. Source: AAP/ 7 News More

The threats are allegedly graphic, with references to Islamic State. The NSW State Government and members of the public were also allegedly mentioned in the diary entries.

It also allegedly outlined plots against Sydney landmarks including the Opera House, along with police and train stations.

A police source told 7 News the alleged diary entries are “vivid”, “disturbing” and “full-on”.

“We have both psychologists and investigators looking at that document to try to interpret the intent and capability but that is, in essence, the offence that is before the court,” Detective Acting Superintendent Mick Sheehy said.

View photos It’s further alleged Nizamdeen planned to target police stations and the Sydney Opera House. Source: 7 News More

Nizamdeen faced court on Friday and did not apply for bail.

Police will allege the 25-year-old was acting alone.