Police are investigating a rally held on Eureka Day in Ballarat where a group of about 30 people wearing black marched through the city shouting white supremacist slogans. Key points: About 30 people marched through Ballarat shouting white supremacist comments while holding banners About 30 people marched through Ballarat shouting white supremacist comments while holding banners The demonstrators covered their faces with balaclavas during the rally The demonstrators covered their faces with balaclavas during the rally Police say a 15-year-old boy not involved in the rally was assisting with enquiries after allegedly giving a Nazi salute The "unplanned demonstration" took...