Crowds of people were seen on Clapham Common on Saturday night where an unlicensed music event took place.
The Metropolitan Police said dispersal zones had been applied in response to the illegal party.
The zones allow officers extra powers to order people to leave the area and not return.
The events continue a sequence of unlawful gatherings in London over the past few nights.
Home Secretary Priti Patel has urged people not to participate in mass gatherings because of the possibility of spreading coronavirus.
Read more on this story here: https://www.telegraph.co.uk/news/2020/06/28/london-police-forced-disperse-crowds-another-night-violence/?WT.mc_id=tmg_youtube_offsite_televideo-youtubevideo_28JuneClaphamCommon&utm_source=tmgoff&utm_medium=tmg_youtube&utm_content=offsite_televideo&utm_campaign=tmg_youtube_offsite_televideo-youtubevideo_28JuneClaphamCommon
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