Four people were gored, two of them seriously, at the running of the bulls in Pamplona, Spain, on Sunday.

Bulls are let loose on the city’s streets every day for the eight days of the San Fermin Festival and thrill-seekers can run alongside them.

During the sixth day of the festival, one of the bulls became separated from the pack, turned back and charged at runners.

One runner was gored in the neck. Another suffered a double goring in the upper chest and thigh.