A brawl broke out between rival protesters assembled outside the Indian Embassy in London on Saturday between British Indians and pro-Khalistani groups.
Outside the Indian High Commission, alleged ISI-backed pro-Khalistani group attacked the UK-based Kashmiri group chanting pro-India slogans, who were counter-protesting against India.
The men wearing Sikh turbans raised slogans 'Naraa-e-Taqbeer', 'Allah-u-Akbar' and 'Khalistan Zindabad.
Scotland Yard has said that one man was arrested for breaching the peace.
The Metropolitan Police said the man was later "de-arrested, with no further action."
Members of groups such as the Overseas Pakistanis Welfare Council (OPWC) and Sikh for Justice clashed with counter-protesters from groups including the Friends of India Society, UK, during a demonstration called to protest against 'atrocities on ethnic minorities in India'
There were no reports of injuries during the clash which involved several police officers intervening to control the few dozen protesters.
Images and videos of the clash have been posted on social media with either side blaming the other for turning a peaceful protest violent.