From the Spanish-language El Mundo, with thanks to Alex. My rough translation of part of the article:
Four prisoners of Kosovar Albanian origin were wounded after suffering a violent attack at the hands of Islamist inmates in the Penitentiary Center of Mansilla de las Mulas in LeÃ³n, because of their refusal to observe Ramadan. The incident took place at 7:30PM on Thursday in Module 6, when a group of between 16 and 18 prisoners of Arab race, armed with the steel dinner trays, attacked “with unusual violence” the four Kosovar Albanians….
Mansilla de las Mulas, in which one third of the 1,500 inmates is Muslim, is one of the jails identified by prison unions as potentially dangerous for the formation of integrist groups. The national secretary of ACAIP and representative of the union in Mansilla, Valentin Flames, characterized the event as “tremendously grave” and denounced the violence of the aggressors, who acted as one, totally organized and without fear of anything.
Flames also said that the problems in the prison get worse during Ramadan.