Police are investigating an incident during which a Just Stop Oil activist was thrown to the floor by the partner of a pregnant woman after an alleged car crash.
Daniel Knorr, 21, was punched and kicked to the ground on Earl's Court Road in London yesterday as the environmental group marched through the capital.
A video of the confrontation was shared widely on social media, and is being investigated by the Metropolitan Police.
The force said they spoke to the protestor who does not want to pursue any action - but enquiries are ongoing to identify the man.
The clip shows a silver Mercedes being pulled halfway across a road, having apparently crashed.
Greggs, Costa & Pret coffees have 'huge differences in caffeine', says reportA woman then leaves the car and screams "Stop now, I'm pregnant" before a man gets out and confronts the protesters, screaming: "Stop now, stop recording, you little s***."
Then, the man is filmed appearing to punch Mr Knorr in the face before stamping and kicking him while he lies prone on the ground.
In a statement shared yesterday, Just Stop Oil said: "Daniel was assaulted while marching this morning, and remained nonviolent throughout. Disruption is difficult, but it's necessary."
After footage emerged online, the Metropolitan Police said in a statement: "We are continuing to investigate a video circulating social media between a protester and member of the public in Earl’s Court Road on Wednesday 19 July.
"Officers have spoken with the protestor who does not want to pursue any action, however enquiries are ongoing to identify the member of the public."
On Monday, footage emerged showing a pedestrian confronting Just Stop Oil activists who took to the streets of London.
It was thought that around 200 people took part in slow marches across roads and bridges in the city.
Some were holding bright orange banners as they marched and all appeared to be wearing hi-vis jackets.
In the video, a man in a white t-shirt walking down Marylebone Road appears to have had enough and begins to grab some of the protestors.
He attempts to push and pull them out of the way of moving traffic so that vehicles can drive down the road.
'I tricked my sister into giving her baby a stupid name - she had it coming'Last Friday, protestors interrupted the live recording of Channel 4 show The Last Leg and presenters had an epic reaction to it.
As the protestors made their way onto the set, host Adam Hills stuck his hands up in the air and began to cheer before being handed an orange hi-vis jacket.
"This is not part of the show," Adam remarked as the protestors handed out identical jackets to The Last Leg stars Josh Widdicombe and Alex Brooker.
One of the protestors ran over to Adam and gave him a hug which the host fully embraced. "I'm William," the Just Stop Oil protestor said as the host replied: "Hi William."
Protestors also stormed the stage during the Proms at the Royal Albert Hall, unfurling an orange banner and attempting to address the audience before they were removed.