San Fermin festival in Pamplona

A statue of San Fermin is carried through the streets. The patron saint is said to protect the hundreds of runners who participate in the running of the bulls Photograph: Susana Vera/Reuters

Cabezudos, or big heads, take part in the procession Photograph: Susana Vera/Reuters

Zaldikos, or horse figures, take a break during the procession to honour San Fermin Photograph: Susana Vera/Reuters

A participant stretches before the first day of the running of the bulls Photograph: Dani Cardona/Reuters

Revellers at the start of the bull run Photograph: Daniel Ochoa de Olza/AP

Revellers are chased by Conde de la Corte ranch fighting bulls Photograph: Daniel Ochoa de Olza/AP

Participants run ahead of the fighting bulls Photograph: A. Arrizurueta/AFP

The bulls trample runners Photograph: Eloy Alonso/Reuters

A runner receives medical attention after being injured Photograph: Dani Cardona/Reuters

Participants are charged by the bulls Photograph: A. Arrizurueta/AFP

A fighting bull takes the curve during the chase Photograph: Denis Doyle/Getty

A runner is attended to after being injured Photograph: Eloy Alonso/Reuters

A runner from New Zealand is attended to by members of the Red Cross Photograph: Denis Doyle/Getty

A reveller is knocked over in the bullring. The bulls are set loose in the bullring after the run in the streets Photograph: Villar Lopez/AP

A reveller is tossed by a heifer Photograph: Joseba Etxaburu/Reuters

A bull jumps on to revelers in the bullring Photograph: Villar Lopez/AP