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Residents had to run for cover after men - believed to be members of Shia and Christian militias - exchanged fire in the streets, during a protest against the judge leading the probe into the Beirut port blast last year.

The Canadian town where residents have been told to stop drinking the water - which appears to have petrol in it.

And we'll hear about a day of action by students in Australia to protest against climate change - they want the government to increase its commitment to carbon reduction.