Suddenly, the protesters begin to shout: "Out, police!" Shortly after, two people leave the protest walking and disappear around a corner. Who are they? Normally, a pair of agents from the Mossos d'Esquadra, from the General Information Commissioner's Office, who dress in plain clothes and listen closely to the demonstrations, especially those that may have a violent component. Now, let's assume that the demonstration has ended in riots and the protesters gather in an assembly to decide the next steps. It is also not strange that there are camouflaged Mossos agents to hear what they will do.

It was a teachers' assembly where the upcoming mobilizations and how the planned strikes would be carried out were to be debated. According to the unions' version, it was a public and open meeting at Institut Pau Claris, in Barcelona, and two women attended who could not be identified. When questioned about their presence, they replied that they were teachers from an institute, but a professor from the same center said he did not know them. Immediately afterwards, they left. Some of those present at the assembly, according to union sources, recognized those two women as mossas d'esquadra.

The conflict between the education sector and the Government escalates one more degree and shakes parliamentary politics. With the new wave of mobilizations underway, and amidst the controversy over the pilot test to introduce plainclothes police officers in schools and institutespilot test to introduce plainclothes police officers in schools and institutes, the unions denounced this Thursday the infiltration of two Mossos agents into an assembly of teachers who were preparing the next strike days. The indignation of the sector has been joined by calls for explanations from the opposition, and ERC, the Comuns, and the CUP have already called for the dismissal of the police chief, Josep Lluís Trapero. For the moment, the police force defends that it acts "always in accordance with current legislation" and the president of the Generalitat, Salvador Illa, has defended its "professionalism".