"I would like to note that the overwhelming majority of those gathered today in London peacefully exercised their right to protest. Unfortunately, there were also a small number who believed that the law did not apply to them," said Adeh Adelekan, second deputy head of Scotland Yard.
According to him, some of the violators have already been detained, the identities of the rest will be established thanks to recordings from CCTV cameras.
Earlier, The Guardian reported that in early November, about 300,<> people took part in a pro-Palestinian rally in London.
Before the march, there were clashes between the police and opponents of the action.
Earlier, hundreds of demonstrators marched in support of Palestine on the streets of New York.