Velocity Alert: Three hostages bolt from Sydney cafe, where others held and Islamic flag displayed

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THIS STORY IS ABOUT TO GO VIRAL

Three hostages bolt from Sydney cafe, where others held and Islamic flag displayed At least 13 hostages are being held in a café in Sydney's busy city district with reports an Islamic flag has been seen in the window. How does Mashable know what's going viral? Mashable built a system called Velocity, which scours the social web, collecting lots and lots of data around how people are engaging with published articles. It then pulls all of that data back to Mashable, dumps it into our own predictive engine, and predicts which articles are about to go viral. Read more at Mashable.com ▶ Mashable, Inc. is a Delaware Corporation. P.O. Box 64 New York, NY, 10159-0064

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