Bull running in Pamplona

Revelers cover their faces after tear gas was released from an unknown source prior to the second bull run
Photograph: Victor R Caivano/AP

Revelers wait for the next run
Photograph: Victor R Caivano/AP

Revelers sleep in a park before the start of the run
Photograph: Alvaro Barrientos/AP

A participant falls while others scatter
Photograph: Pedro Armestre/AFP/Getty Images

Hundreds of 'mozos', or runners, walk through the streets of Pamplona at the end of the second run
Photograph: Jesus Diges/EPA

A bull falls on a runner
Photograph: Ander Gillenea/AFP/Getty Images

Day one: People stand on balconies overlooking Estafeta street for the run of the Penajara ranch fighting bulls
Photograph: Victor R. Caivano/AP

Crowds wait for the first run to begin
Photograph: Ander Gillenea/AFP/Getty Images

Fighting bulls and steers run round a corner
Photograph: Denis Doyle/Getty Images

Crowds run through the streets of Pamplona
Photograph: Alvaro Barrientos/AP

A runner is caught by the horns of a fighting bull
Photograph: Pedro Armestre/AFP/Getty Images

The man is then trampled by the bulls
Photograph: Pedro Armestre/AFP/Getty Images

A boy from El Salvador watches the action from a balcony
Photograph: Victor R. Caivano/AP

People stand in doorways as others run with the bulls
Photograph: Alvaro Barrientos/AP

Runners and bulls lose their footing on the cobbled streets
Photograph: Vincent West/Reuters

The first run lasted two minutes and 23 seconds, the Navarra government press office said
Photograph: Eloy Alonso/Reuters

Fallen runners try to protect themselves from the bulls
Photograph: Ana Castro/AP

People attempt to dodge the bulls as they stampede past
Photograph: Ander Gillenea/AFP/Getty Images

A man is thrown in the bullring
Photograph: Joseba Etxaburu/Reuters

A runner gets tossed
Photograph: Joseba Etxaburu/Reuters

One of the cattle leaps over revellers in the bull ring
Photograph: Joseba Etxaburu/Reuters

People watch as a statue of San Fermin is carried through the streets during a procession in honour of the saint
Photograph: Jesus Diges/EPA