Police said that as of 10.10pm this evening there had been five arrests relating to the 'Million Masks March' through London.
A man was held on suspicion of a fireworks offence, before being subsequently "de-arrested".
A second man believed to be in his early 30s was arrested near Buckingham Palace on suspicion of assaulting a police officer, and a 37-year old woman was arrested in nearby Birdcage Walk on suspicion of the same offence.
Two further people have been arrested - one on suspicion of obstruction of the highway and one on suspicion of attempted grievous bodily harm.
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