Protesters will attempt to superglue themselves police officers guarding COP26, it's been claimed.
Frontline staff were warned to avoid shaking hands with demonstrators in case they're targeted in the stunt.
It comes as FM Nicola Sturgeon issued a warning to climate activists bent on causing chaos when the two-week climate summit starts on Sunday.
A source said: "Protestors have used superglue in the past to attach themselves to things.
"But officers were briefed on things they should watch out over the next fortnight and it included protesters trying to glue themselves to cops.
"They were told that if a protester extends their arm to shake hand they must not accept under any circumstances.
"People on the outside might think that officers who refuse to shake hands with protesters are making a statement.
"But frontline numbers are already stretched. Officers being removed from their duties to be detached from a protester and possibly require medical attention must be avoided.”
David Hamilton of the Police Federation said: “These are the types of things that we are aware can happen generally.
“If a police officer does not shake your hand it’s no disrespect it’s because, one, there is a global pandemic and, two, these are the kinds of things that can happen.
“It’s a hinderance more than anything else. At the end of the day if someone superglued themselves to an officer we would just unglue them.”
World leaders and around 30,000 delegates will descend on the SEC in the city for the summit which will last until November 12.
Thousands of climate activists are set to take part in demonstrations demanding those in power address the crisis.
During Thursday’s First Minister’s Questions, Tory leader Douglas Ross called for a “zero tolerance approach” to disruption during the summit.
He asked: "Will the First Minister reassure the people across Glasgow that there will be a zero tolerance approach to protest that disrupt people going to their work, including doctors and nurses, and ambulances carrying urgent need of medical care."
Sturgeon replied: "I'll be having further discussions with the Chief Constable over the course of today and tomorrow around this.
"He has been very clear that there will be a sensitive policing operation that will do everything possible to facilitate appropriate and peaceful protest.
"Police Scotland will respond to any protests that seek to break the law and of course disrupt people beyond what would be considered reasonable.
"People do want to come to make their voices heard. I think that is understandable given the importance of the issues under discussion.
"What I would say to people looking to come to protest in Glasgow. Come, do it peacefully and do it with a recognition that the people of Glasgow are agreeing to host this conference are suffering some disruption because of that.
"So don't add to that disruption for them."
ACC Bernard Higgins said: "The safety of officers and staff policing COP26 is a priority for Police Scotland. Detailed briefings have been provided as part of the plans in place to deliver a safe and secure event, however we would not comment on the specific detail of these briefings."
Various campaign groups and demonstrators will carry out activism over the coming weeks.
Early this week we told how a campaigner dressed as Boris Johnson set fire to a prop boat in protest against fossil fuels on the banks of the River Clyde.
The incident was carried out by Ocean Rebellion, an offshoot of climate change activist group Extinction Rebellion.
