A pro-Russia online commentator known as the "Aussie Cossack" has been charged with assaulting a 76-year-old man at a Sydney rally in support of Ukraine.
Simeon Boikov, who uses the nom de plume "Aussie Cossack", posted videos on his YouTube channel on Tuesday of him at the Town Hall rally.
Video appeared to show Boikov scuffling with an elderly man, who fell and was later taken to hospital with a head injury.