(en) Australia, Media, Brisbane G20 security in full swing

Queensland Police Commissioner Ian Stewart has told that police are aware of a number of 
anarchist organisations active on social media. ---- The head of the International 
Monetary Fund will lead the stream of world leaders arriving in Brisbane on Thursday for 
the G20 summit. ---- The IMF's managing director Christine Lagarde is due to arrive on 
Thursday morning, with leaders and delegations from Saudi Arabia, Argentina, Brazil and 
2015 G20 host Turkey to follow. ---- And the security operation aimed at keeping world 
leaders safe is in full swing. ---- Barricades have been erected at city hotels where the 
leaders will be staying, some roads have been closed, and there's a ring of security 
around the Brisbane Convention and Exhibition Centre where the summit is being staged. 
---- Three US presidential helicopters have been spotted flying over the city, in 
preparations for the arrival of US President Barack Obama, expected early on Saturday.

He's expected to make his way to the University of Queensland's St Lucia campus, where a 
special security zone will be in force for his speech to students there later that day.

Meanwhile, police have said they are not aware of a group of activists on social media 
calling on lone wolves to infiltrate G20 protest groups to 'fight and destroy governments'.

Queensland Police Commissioner Ian Stewart has told The Courier-Mail that police are aware 
of a number of anarchist organisations active on social media.

Police have previously warned there's a real risk of 'violent and destructive elements' 
trying to infiltrate the many peaceful protests planned on the sidelines of the G20.

Most protest activity is expected on Saturday, when the summit officially starts.

But before then, union and corporate bosses are meeting at the Labour 20 and Business 20 
partner summits.

The L20 and B20 have both welcomed the objective of the G20 under Australia's presidency 
to boost global growth by two per cent by 2018.

But they also say this collective growth target needs to be 'strong, sustainable and 
inclusive'.

More than 6000 police and 900 soldiers have been deployed around Brisbane before the 
summit, which is costing $500 million to host.