Australian Muslims are being urged to be aware of the possibility of a local backlash after the deadly terrorist attack in London this week.

British soldier Lee Rigby, a 25-year-old Afghan war veteran, was killed near the Royal Artillery Barracks in Woolwich, south-east London, on Wednesday.His family have remembered him as a devoted father and loving husband.Muslim community leaders say they fear Australian Muslims could be targetted in reprisal for the incident.The Australian Muslim Youth Network has sent text messages and emails warning Muslims to avoid arguments about their faith and steer clear of anti-Islamic protests planned for some Australian cities."Some people may harm innocent Muslims in return, so be cautious," the message reads.

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As the federal election sweeps closer, the pressure to sell the politicians and their parties is intensifying - and the strategists are turning to digital technologies like never before to give candidates an edge. The huge growth in social media and data analytics over the past three years means this election campaign will be like no other in Australian history. But Australian strategists are still learning how to harness the new opportunities on offer, so they are looking to the lessons from Barack Obama's recent re-election in the United States.  The acclaimed campaign returned the Democrat president for a second term when the Republicans thought Mitt Romney was headed for the White House.The point of difference was that the Obama team harnessed social media, engaging a record-breaking number of Americans through mobile, email, video and web formats.