A Pullenvale property filled with explosives also allegedly contained maps with targets drawn in Sydney and Newcastle, according to media reports.
Police carried out 17 controlled detonations at the vacant home last week after a real estate agent unwittingly stumbled across other suspicious items on Wednesday night, leading to officers discovering the explosives haul.
The former tenant, Daniel Fing, is in police custody in New South Wales on unrelated matters.
Mr Fing, who is yet to be charged over the find, has a prior conviction for blowing up his ex-girlfriend’s lover's car in Newcastle.
According to Nine News, investigators located 29 kilograms of chemicals and 22 litres of liquid explosives in the Pullenvale home on Red Cedar Road.
A map inside the home reportedly contained the words “George Street” and “Uniform”, with an arrow pointing to an intersection. It is believed this is the intersection of George Street and Rawston Place in Sydney, near Central railway station.
Nine News said the second map had the words “brothel”, “bridge” and “grave”, representing an area of Mr Fing’s hometown of Newcastle.
The explosives haul is now being investigated by Australian Federal Police and Queensland Police.
However Queensland Police refused to provide further comment.
“It’s an ongoing multi agency investigation and as such it's not appropriate to comment at this time,” a police spokeswoman said.
Mr Fing was jailed over a 2006 bombing in Newcastle, where he used “highly volatile” explosives to blow up the car of an ex-girlfriend’s lover.
The device contained triacetone triperoxide, the same substance used during the 2005 London bombings.
In 2011 Mr Fing survived a drive-by shooting when a gunman opened fire at his home in Belmont, NSW. The man charged with Mr Fing’s attempted murder was later found not guilty.
