Climate change activists from Insulate Britain have blocked an intersection between the M25 and a main road in central London.
The group said there were around 40 protesters in the street at Junction 25 of the M25 in Waltham Cross, Hertfordshire and on the A501 at the Old Street roundabout.
The protests led to long traffic jams in rush hour traffic on Friday morning.
A video posted on social media by LBC radio shows protesters walking in front of a police car at the M25 junction.
The officers then drag some of the activists off the street.
The Metropolitan Police said: “Arrests were made at the M25 protest. Four people have been stuck to the street, they will be removed.
“The officials have cleared the driveway to the A10.
“Activists on Old Street, Islington, continue to block the street, which also has a number of people clinging to the surface.
“This is causing undue disruption to the community. Teams of specialists are on site working to remove the protesters.”
It is the 12th day in the past four weeks that the group has been protesting on the streets.
Insulate Britain admitted its actions on the M25 “violated” a UK government injunction last month.
Tracey Mallagan, a spokeswoman for the group, said: “If governments do not act soon to reduce emissions, we will face a dire situation.
“We won’t worry about a shortage of pasta or toilet rolls because law and order collapse pretty quickly when there isn’t enough food.
“The government will not wonder if there are enough hospital beds or ventilators, but if there are enough people left to bury the dead.
“The government is destroying our country. Boris Johnson should be tried for high treason. Our flesh and blood are thrown aside as expendable.”
Transport Secretary Grant Shapps called Insulate Britain “sticky fools”.
He told LBC, “It’s dangerous, it’s really outrageous, and ironically, it’s likely to contribute to pollution when cars idle waiting for their nonsense …
“Existing laws need to be tightened to get these sticky fools off the streets, and the Home Secretary has said she will do so in the law on crime and law enforcement that goes through parliament.
“In the meantime, I am actively seeking injunctions covering the national motorway network around London in the south east. Now these people can go to jail for what they do.
“I can very well imagine that the courts are of the opinion that they are ignoring a court order. It can be unlimited fines, it can be six months in jail, we have been actively serving private individuals – over 100 have been served and I think we are going to find that the courts are taking a very, very somber attitude and locking up some of these people, that is unacceptable .
“I can tell you that these injunctions may have been violated and people may go to jail.”
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