He said the raids were a 'major joint counter-terrorism operation' and reminded the Australian people 'the threat of terrorism is very real'.
'The office of transport security has advised security screening will take longer, and travellers should arrive at terminals at least two hours before flights to allow ample time for screening,' he said on Sunday.
The apparatus was reportedly 'ready to go' as counter-terrorism police stormed properties across the city's west and inner-east.
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A family of alleged Islamic extremists are accused of planning to bring down a passenger plane in an ISIS-inspired terror attack in Australia.
Two Lebanese-Australian father and son duos are reportedly the four men arrested over the alleged plot after dramatic raids across Sydney on Saturday afternoon.
The other father and son duo are understood to have been arrested in separate raids.
Counter terrorism police (pictured) stormed four Sydney properties and arrested four men including one man (pictured) at Surry Hills after being alerted to an alleged plot to bring down an plane with a 'bomb'One man draped in a bed sheet with a heavily-bandaged head was seen being led into an ambulance outside a Surry Hills property.
Police say they have limited information so far about the date, location or specific strategy involved.
NSW and Federal Police swooped on five properties in the Sydney suburbs of Surry Hills, Lakemba, Wiley Park and Punchbowl on Saturday afternoon and found a 'considerable' amount of material.
But police won't say if they discovered an actual explosive device.
AFP Commissioner Andrew Colvin said they treated the plot as credible and there was an intention and 'quite possibly a capability' to carry it out.
Residents living near the Surry Hills home, just metres from the Redfern Mosque, were evacuated while the bomb squad worked to remove the 'explosive device.' One neighbour of a man arrested in Wiley Park told The Daily Telegraph the accused would nurture stray cats in the area.'He and his brother would feed about 15 cats and when we complained that they were bringing ticks and diseases into the block, they would walk off,' they said.