Among those injured by what were reportedly knocks was an American citizen from New York, age 54.
Worldwide travelers flock to Pamplona, a town in northern Spain, for the annual San Fermin festival.
The bull runs that happen early in the morning are the main attraction of the July celebrations.
The ‘encierro,’ or bull runs, begin at 8 a.m. and take place through the town’s streets over a half-mile route, with hundreds of participants chasing after six bulls and six docile oxen.
It draws visitors from all over the world; it is estimated that almost 1.7 million people have been to Pamplona.
Every year, campaigners for animal rights fight against the festival, claiming the animals used for its participation suffer cruelly.
PETA and AnimaNaturalis staged a demonstration in the Plaza Consistorial before of this year’s event, complete with bull horns and fake blood coverings.
