Violence has erupted in central Sydney as hundreds of Muslims protest against a controversial film about the Prophet Mohammed.

It is the latest in a series of demonstrations that have killed at least six people in the Middle East. Protestors have also marched through London.

The wave of protests spread to Sydney's CBD this afternoon, beginning outside the United States Consulate and spreading through the city's streets to Hyde Park.

The ABC understands the protest was sparked by a mass text message saying: "We must defend the honour of our prophet, we must act now."

NSW Police Superintendent Mark Walton said the demonstration was unorganised and some protesters "came forearmed to cause damage".

He said up to 150 police officers were called to the protest. Six officers were injured during the afternoon and two were taken to hospital for treatment.

Superintendent Walton said the protesters left the demonstration by 6:00pm.

Here is how the story developed throughout the day.

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Read more :
http://www.abc.net.au/news/2012-09-15/anti-us-protests-hit-sydney/4263372
http://www.smh.com.au/nsw/police-gas-sydney-protesters-20120915-25yrb.html