On the day of the referendum, the inaction of part of the autonomous police force of Catalonia, the Mossos d'Esquadra, allowed many polling stations to open. The Spanish National Police Corps and the Guardia Civil intervened and raided several polling stations after they opened. 893 civilians and 111 agents of the National Police and the Guardia Civil were reported to have been injured. According to various sources these previously reported figures may have been exaggerated. According to the judge from Barcelona who is currently investigating the accusations of police violence, there were 218 persons injured on that day in the city of Barcelona alone, 20 of whom were agents. According to the official final report by the Catalan Health Service (CatSalut) of the Generalitat 1066 civilians, 11 agents of the National Police and the Guardia Civil and 1 agent of the regional police, the Mossos d'Esquadra, were injured. The United Nations High Commissioner for Human Rights, Zeid Ra'ad Al, urged the Spanish government to prove all acts of violence that took place to prevent the referendum. The police action also got criticism from Amnesty International and Human Rights Watch which defined it as an "excessive and unnecessary use of force". Spanish Supreme Court judge Pablo Llarena stated Puigdemont ignored the repeated warnings he received about the escalation of violence if the referendum was held.