The Movimiento Socialista has been gaining prominence at the Sol encampment, according to El Mundo, alongside a rise in red flags that express disdain for Sánchez, Podemos and the Frente Amplio.
El Mundo describes the group as communists linked to GKS, which the paper says has the Basque university on edge, and as former members of the abertzale left.
According to the report, the group accuses the government of being responsible for the situation. It also blames the government for what Maricarmen Abascal suffered.