Navarra Hospital chief Javier Sesma said three people were injured but no one was gored in the crazed, two-minute dash today in the northern Spanish city of Pamplona.
National television replays showed two separate runners being caught between the horns of bulls and being flung to the ground, narrowly escaping being gored.
Thousands of thrill-seekers race daily with the bulls along a 930-yard route from a holding pen to the city bull ring.