FIRST ON 7: A man involved in a scuffle with police in Kings Cross is planning legal action against police, claiming officers "extreme" actions left him on crutches and unable to work.
Nari Rossi-Murray was one of six people arrested early Sunday morning when police used "overwhelming force" to handle the situation.
Video captured by witnesses show police kneeing the 25-year-old in the head.
Police said in a statement to 7 News "anyone who brings it upon themselves to violently confront police in the course of their duty will find themselves under arrest".
Mr Rossi-Murray said he understood police had a job to do but added the officers' actions were "extreme".
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"They're there to do their job, I understand that but they didn't have to take it to that extreme, it's wrong, they shouldn't be able to do this and get away with it," he told 7 News.
Mr Rossi-Murray, along with two other men and three women were charged, accused of obstructing police during the arrests.
Police used capsicum spray to subdue a number of the alleged offenders, but some witnesses told 7 News police tactics were over the top.
"The guy was just asking what he did wrong. He just didn't know," one witness told 7 News.
Three police were allegedly assaulted during the arrests.