Eggs and water balloons thrown as protesters face off at Women Will Speak rally in Melbourne

Victoria police said 20 protesters were outnumbered by 150 from another group, which hurled water balloons at the speakers'

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Projectiles were thrown at speakers and one person arrested as protesters and counter-protesters faced off outside Parliament House in Melbourne on Saturday.

About 20 people initially attended the planned #WomenWILLSpeak rally that commenced at about 11am, Victoria police said in a statement.

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