Madrid (CNN) Five men known as the "Wolf Pack" have been sentenced to 15 years in prison for rape by Spain's Supreme Court, after more than a year of heated protests over their original, lighter conviction.

The men were convicted of sexual abuse but cleared of gang rape charges in December 2018 for their attack on a teenage girl, which happened at the 2016 running of the bulls in Pamplona.

The country's highest court has now reversed that decision, upgrading their conviction and dealing a long-awaited victory to the thousands of protesters who have taken to the streets throughout the case.

Defendants Jose Angel Prenda Martinez, Angel Boza Florido, Jesus Escudero Dominguez, Antonio Manuel Guerrero Escudero and Alfonso Jesus Cabezuelo Entrena -- known as the Wolf Pack after the name of a WhatsApp group they spoke on -- recorded cellphone video of their encounter in July 2016 with the woman, then 18.

Four of the men were arrested after the Friday ruling, police told CNN, leaving just one at large.

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