G20 protests: Police uses water cannons against crowd in Hamburg

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As thousands of protesters converge on Hamburg to protest the G20 leaders summit, city authorities have introduced unprecedented security measures. Footage shared on social media shows dozens of police officers in full riot gear descending on the activists. Behind the police, lines of water cannons that are being used against the protesters.

READ MORE: Hamburg police deploy water cannons against G20 protesters (PHOTOS, VIDEOS)