The unrest happened in Wembley after an event was held to mark the death of Iranian president Ebrahim Raisi.
Four people have been injured and one arrested following a clash between pro-Iran supporters and anti-Iranian government protesters.
The Metropolitan Police said officers were called to Alperton Lane, Wembley, at 6.21pm on Friday following reports of disorder.
An event was taking place to mark the death of the president of Iran, Ebrahim Raisi.
The Met said anti-government protesters had gathered outside the venue and clashes broke out between the groups.
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A spokesperson for the Metropolitan Police confirmed four people were injured and treated by paramedics.
One person was also arrested on suspicion of violent disorder.
The spokesperson added: “Their injuries are not believed to be either life threatening or life changing.
“Further inquiries will now follow to establish what further offences took place and to identify those involved.”
William Turner is a seasoned U.K. correspondent with a deep understanding of domestic affairs. With a passion for British politics and culture, he provides insightful analysis and comprehensive coverage of events within the United Kingdom.