Tensions boiled over in central London as rival groups clashed during a memorial for the assassinated Iranian Supreme Leader.
Protesters clashed with those demonstrating in support of the late Ayatollah Ali Khamenei, who was killed in a US-backed Israeli air strike in February.
There was a heavy police presence at the Islamic Centre of England in Maida Vale on Saturday afternoon.
The Metropolitan Police and the City of London Police could be seen working to calm outbursts, asking disruptive protesters to move on and marshal traffic.
Met officials say 25 people have been arrested for protests in London today, including 18 arrests for supporting Palestine action, reports Sky News.
Two police officers were seen monitoring the protest with a video camera from the balcony of a residential property opposite the centre.
Outside the centre, demonstrators carried placards featuring photos of Mr Khamenei, and waved the Iranian flag.
Many wore a keffiyeh and some carried Palestinian flags and signs reading slogans such as ‘Boycott Israel’, ‘Stop bombing Iran’, and ‘Free Palestine’.
People attend a memorial event outside the Islamic Centre of England in London, for Ayatollah Ali Khamenei, who died in US strikes on Iran last month
Met officials have confirmed that 18 arrests were made today for supporting Palestine Action
An Iranian holds an Israeli flag and others chant ‘Long live Iran, long live Israel’ as Iranians stage a protest in front of the Iranian Embassy in London to show their support to a regime change in Iran in the face of Israeli and the US attack on Iran
Shouting at the group from the other side of the road was a large group of counter-protesters, many carrying the sun and lion flag that represented Iran before the 1979 revolution overthrew the Pahlavi dynasty.
One sign held up by a counter-protester showed US president Donald Trump and Israeli prime minister Benjamin Netanyahu, with the caption: ‘We trust you’.
The counter-protesters chanted, blasted music and sounded horns, with many dancing and singing.
Many carried placards featuring photos of Iran’s exiled crown prince Reza Pahlavi.
One group of counter-protesters arrived in convoy on motorbikes, flying the sun and lion flag.
Some drivers passing the protest in cars or on motorbikes sounded their horns and waved both the current and the previous Iranian flags.
Some drivers held up peace signs, while others shouted in support or opposition to either side, and at least one vehicle was chased by a few of the counter-protesters.
Outside the centre, refreshments were served for those entering the memorial service.
