Anti-lockdown protesters have marched in major Australian cities, as Covid cases spiked to record numbers in Sydney and authorities warned of a "continuing and growing problem". Thousands of angry, unmasked people marched through the Sydney central business district on Saturday afternoon demanding an end to the city's lockdown, which is entering its fifth week. After protesters were dispersed, the New South Wales police minister, David Elliott, announced the formation of a strike force to identify each of the 3,500 protesters at the "super spreader" event. Elliott said 57 people were arrested and several police officers had been assaulted. In Melbourne, thousands of protesters turned out in the central business district chanting "freedom". An AAP photographer on scene described the rally as initially "eerie" with the crowd maskless and verbally aggressive, but said the atmosphere later mellowed. Some protesters lit flares as they gathered outside Victoria's Parliament House. Protesters held banners, including one that read: "This is not about a virus, it's about total government control of the people." The protest was brought to a violent end by police. An AAP photographer wearing visible press accreditation was pepper sprayed as police cleared the rally, as were other photographers.