Injuries and arrests in Melbourne as anti-war protesters and police clash in fiery scenes

Police accuse some protesters of throwing acid and other objects amid criticism of officers' tactics outside Land Forces weapons expo

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Dozens of police and protesters have been injured and 42 people arrested amid a series of confrontations at an anti-war protest in the Melbourne CBD in which pepper spray was deployed and horse faeces was thrown at officers.

Fires broke out while police responded to a rally outside the Land Forces exposition - an international military conference - at the Melbourne Convention and Exhibition Centre on Wednesday.