Spanish health officials say the final bull run of the San Fermin festival in Pamplona has left six people injured in the fastest dash this year.

Tomas Belzunegui, a spokesman with Navarra's provincial hospital, said the six were bruised after being trampled on Saturday as the bulls completed the 850-metre course along cobbled streets in two minutes, 12 seconds.

One man was dragged for several metres by a bull after a horn got entangled in his neckerchief. He was taken away on a stretcher.

The eight bull runs on consecutive days caused injuries to a total of 28 people this year. Two of them were gored.

The festival draws around one million visitors each year. Dancing, food and alcohol are among the main attractions.