The police claimed that protesters of the rebellion hide nails and blades in "lockable" tubes.
The eco-warriors have started a two-week protest to end London and try to force the government to reduce the country's carbon emissions.
The group was photographed sticking to the ministries buildings, handcuffing cars and climbing rooftops and planes.
Another method used by the left-handed group is to put the arms in tubes and lock themselves.
Police said protesters hide blades and nails in the tube, making it harder to cut them.
An officer said: "We are part of the public order demonstration liberation team and we are here to bring the protesters where they are stuck, whether it is flush with the floor or in height.
"We are currently working on three and possibly three others after that.
"Lockouts are becoming more advanced rather than having a monolayer tube.
"We may have a three or four layer tube with different materials, so it's much more complex.
"So we have to use a lot more tools to break through each of these layers.
WHO ARE REBELLION EXTINCTION?
Extinction Rebellion asks the government to declare a climate and ecological emergency, to act immediately to end the loss of wildlife and reduce greenhouse gas emissions to zero dollar of here 2025.
Earlier in the year, Parliament declared a climate and environmental emergency and the government passed a law to reduce emissions to zero dollars by 2050, much later that activists do not demand.
The group organized 11 days of demonstrations in London in April that disrupted public transport and roads.
On Thursday, the activists of the Extinction rebellion used a fire pump to suck a red liquid to the treasure to draw attention to what they said was the government's failure to avoid a climate disaster.
Last week, the Met warned that the demonstrations removed officers from other vital roles in the capital, including the fight against knife crime and domestic violence.
More resources have been used to combat climate change than to fight terrorism, it was said.
& # 39; MORE DANGEROUS & # 39;
"A ground level takes five or six officers.
"If we are up to it, we could look for 10 or even 12 officers just to secure this area while we work for us and the protesters.
"What we have found is that the protesters are making the situation a little harder and more dangerous for us and could contain nails, blades and any kind of sharp metal in the concrete."
Extinction Rebellion London replied: "We sympathize with the police on duty, no one wants to be here.
"We are peaceful, we ask for understanding and restraint.The government's inaction in the face of the climate emergency is also harmful to the police."
The civil disobedience group immobilized the capital this week and yesterday the protesters targeted the main BBC office on the fifth day of action.
Protesters have camped on roads around Parliament Square and Whitehall since Monday, calling for urgent action on climate change and wildlife.
A total of 500 police from England and Wales from other forces were brought in to help cope with the protests.
We recounted how a protester from the extinction rebellion had stuck to the top of a British Airways plane at the London City Airport, while the total number of people in the city of London had dropped. arrests rose to 1,000.
The man, who was identified by Extinction Rebellion as former Paralympic cyclist James Brown, kept the plane in a video broadcast online by the protest group.
Chief of the Metropolitan Police, Cressida Dick, said the force had been "stretched" by the public nuisance tactics of Extinction Rebellion, impeding its ability to respond to other crimes.
As the first week of demonstrations ended, the Met announced that it had arrested more than 1,200 demonstrators, who were also confronted within hours with the deadly killing of two teenagers in the city.
The chief of the Metropolitan Police, Cressida Dick, said the force had been "stretched" by the public nuisance tactics of Extinction Rebellion, impeding its ability to respond to other crimes.
Lady Cressida stated that she hoped the protesters would either choose to "protest legally" or "go home" after their "refusal to take and occupy the streets that they wanted" .
She said: "If they do, I can of course send many of my officers to the streets, neighborhoods, schools, London neighborhoods.
"We answer all serious and urgent questions, of course, by pursuing our criminal investigations for homicide or armed robbery … but we have to move work from one unit to the other and the less urgent, less critical, less important work is of course late. "
A spokesperson for Extinction Rebellion told The Sun Online: Rebellion Extinction is based on love and non-violence and we are unaware of any deliberate attempt to make imprisonment dangerous for the police .
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"The recourse to violence is totally contrary to the nature of this movement and no attempt in this direction would be consistent with our principles and our values.
"We apologize to the police for the increased pressure on them, but we urge them to recognize the loving nature of the Extinction rebellion and to explain why we are here on the streets protesting relentlessly. everyone understands their children too. "
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