Coronavirus: NSW police vow to crack down on any further anti-lockdown protests

New South Wales police have vowed to crack down on anti-lockdown protesters, after mass demonstrations over the weekend.

Around 3500 mostly maskless people took to the streets in Sydney on Saturday in an anti-lockdown protest that authorities called "absolutely disgraceful". 

Speaking to media on Monday, NSW Police Commissioner Mick Fuller issued a stern warning for anyone planning on attending further protests, saying "you will be arrested".

"There are some discussions, there is information on the internet at the moment, about a potential protest this Saturday.

"Can I just put this warning out now to everyone? We will be heavily policing that event," he said.

"We will take the ground very early. You will be arrested and prosecuted.

"The community has spoken about that behaviour. The Premier has spoken about that behaviour and it won't be tolerated again."

Fuller added that police would "chase down every individual we can identify".

Dozens of people were arrested on Saturday, with NSW Police Deputy Commissioner Mal Lanyon describing the protesters' actions as "absolutely disgraceful".

Lockdown restrictions are currently in place until July 30 in the state, but officials warned there was a likelihood they might be extended following Saturday's protest, which many said had the possibility of being a super-spreader event.

On Monday, health officials announced the state had recorded 145 new cases of COVID-19 in the community in the 24 hours to 8pm on Sunday - 51 of which were infectious in the community before they tested positive.

The latest figures come after 163 community cases were recorded on Friday, the highest number yet in the current outbreak.