Police Scotland has been accused of using heavy-handed tactics during the climate protests in Glasgow last weekend.
Greens MSP Ross Greer took to social media to complain about the "totally disproportionate policing" throughout the Global Day for Climate Justice parade on Saturday.
Around 100,000 people from across the world descended on Glasgow to urge world leaders to take global warming seriously.
Throughout the march on Saturday more than 20 activists were arrested.
A Police Scotland chief had stated that the climate protest passed 'largely without incident', yet some arrests were made.
However, Greer hit out at cops for kettling a group during the march.
The West Scotland MSP tweeted: "The right to protest is essential, especially during #COP26.
"We're concerned by multiple incidents of what looks like totally disproportionate policing, especially the kettling of one bloc on Saturday's march.
"@MaggieChapman & I are writing to @PoliceScotland for an explanation."
Assistant Chief Constable Gary Ritchie revealed that 22 people were arrested, with the majority of them subsequently released.
The march, which saw protestors march from Kelvingrove in the west end to Glasgow Green, ended with a rally in the park in the east of the city centre where speakers, including Ugandan Activist Vanessa Namate and leaders of indigenous groups from around the world, addressed the crowds.
Assistant Chief Constable Gary Ritchie said: “As part of our facilitative and no surprises approach to ensuring people’s rights to protest peacefully are upheld, Police Scotland has been completely transparent in respect of deployments and engagements with protesters during COP26.
"Therefore, everyone should be aware of the overall policing tone and style as being friendly and accommodating but also that behaviour which is violent or likely to compromise public safety will be dealt with swiftly and robustly.
“It is disappointing that the narrative presented centres only around the point when the police required to intervene and remove the protesters, about halfway through the march, ignoring the events both before and during the march leading up to the direct action by the police.
"To be clear, this group was aggressive prior to the march, refused to follow instructions and attempted to incite police officers into confrontation. They were warned about their behaviour and told that, if this persisted, police would intervene on public safety grounds.
"In line with our facilitative approach, we permitted the group to take part in the march, however, during the procession their behaviour became more concerning, increasingly aggressive and obstructive to an extent that threatened the safety of other participants and police officers.
"This was not only creating public safety issues, it was also preventing other people in the procession from exercising their right to protest by not being able to continue their march to Glasgow Green.
"Accordingly, the decision was taken to intervene and remove this group from the procession.
"Ultimately, one member of the group was arrested and charged with culpable and reckless conduct for using a pyrotechnic in an intimidating way. The remainder of the group was later allowed to continue to the rally in Glasgow Green.
“I would personally like to thank the vast majority of participants on Saturday who engaged positively with police and organisers and contributed to a carnival atmosphere and a spectacle which will long be remembered by the city of Glasgow.
“The tactic of containment is used only when necessary by highly trained officers and, on this occasion, was a necessary and proportionate response to a comparatively small number of protesters intent on causing violence and disruption, compromising public safety.”
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