for, or planning terrorists acts". On the morning of 10 February police were informed the two were planning a terrorist attack. They were quickly placed under surveillance and tracked. When they purchased a hunting knife from a store about 3:00 pm, NSW Joint Counter Terrorism Team (JCTT) forces decided to intervene and soon after 4:00 pm the men were arrested. The men were a 24-year-old student from Iraq, and a 25-year-old nurse who moved from Kuwait in 2012. The two were unknown to police until the tip-off. The men's residence, a vehicle and places of work were searched. They were found with a machete, a hunting knife, a homemade Islamic State flag and "a video which depicted a man talking about carrying out an attack", according to NSW Police Deputy Commissioner (Specialist Operations) Catherine Burn. One of the men arrested appeared in the video. Burn also said: "We will allege that both of these men were preparing to do this act yesterday" and "We believe that the men were potentially going to harm somebody, maybe even kill somebody …". The JCTT investigation has been given the code name Operation Castrum. May 2015 Melbourne On 8 May 2015 a 17-year-old was arrested in Greenvale, Melbourne for plotting to detonate home-made bombs. He was charged with: Three alleged improvised explosive devices were found and rendered safe in a park by controlled detonation. The teenager appeared in court on 11 May and was remanded to reappear on May 26. 'Operation Amberd' was formed, and investigations made for 9 days, after a call to a security hotline. AFP and Victorian police of the Melbourne Joint Counter Terrorism Team (JCTT) carried out the raid. AFP Deputy Commissioner Mike Phelan said: "We can absolutely guarantee we have stopped something." December 2016 Christmas terror plot On 23 December 2016 seven people were arrested in Melbourne for plotting an attack on Christmas Day. Properties were raided at Campbellfield, Dallas, Victoria, Flemington, Gladstone Park and Meadow Heights. The would-be terrorists planned to attack Federation Square, Flinders Street railway station and St. Paul's Cathedral, three landmarks clustered in the centre of Melbourne. An explosive device and other weapons were to be used. Abdullah Chaarani, Ahmed Mohamed and Hamza Abbas were found guilty 2 November 2018 in the High Court of Australia of plotting an attack in the name of the Islamic State. The trio smiled, laughed and made thumbs up