Running of the bulls at the San Fermin festival in Pamplona, Spain

Revelers try to avoid a fighting cow inside Pamplona’s bullring during the second day of the San Fermin Running of the Bulls festival in Pamplona, Spain. The annual Fiesta de San Fermin, made famous by the 1926 Ernest Hemmingway novel “The Sun Also Rises,” involves the daily running of the bulls through the historic heart of they city to the bullring.

(David Ramos / Getty Images)

July 7, 2015 8:06 AM PT

Two Americans and a Briton were gored, and eight other people were injured Tuesday as thousands of daredevils dashed alongside fighting bulls through the streets of Pamplona on the first bull run of the annual San Fermin festival.

Revelers run with Jandilla fighting bulls along the Calle Estafeta during the second day of the San Fermin Running of the Bulls festival in Pamplona, Spain.

(Pablo Blazquez Dominguez / Getty Images)

A Jandilla bull charges a participant during the first bull run of the San Fermin festival in Pamplona, Spain.

(ANDER GILLENEA / AFP/Getty Images)

In this slow shutter-speed picture, revelers run with a Jandilla fighting bull during the San Fermin festival in Pamplona, Spain.

(Daniel Ochoa de Olza / Associated Press)

Revelers and children are “chased” by the Toro de Fuego, or flaming bull, as it runs throught the streets during the opening day of the Running of the Bulls in Pamplona, Spain.

(David Ramos / Getty Images)

A wild cow jumps over participants in Pamplona’s bullring after the first bull run of the San Fermin festival in Spain. The festival is a symbol of Spanish culture that attracts thousands of tourists despite heavy condemnation from animal rights groups.

(CESAR MANSO / AFP/Getty Images)

A reveler is tossed during a celebration held at the bullring after the running of the bulls at the San Fermin festival in Pamplona, Spain.

(Daniel Ochoa de Olza / AP)

Mike Webster, a 38-year-old occupational therapist from Gainesville, Fla., gives a thumbs-up as he is loaded into an ambulance after being gored in the armpit by a Jandilla fighting bull at the San Fermin festival in Pamplona, Spain.

(Alvaro Barrientos / Associated Press)

A reveler is tossed by a cow with dull horns during a celebration held at the bullring after the running of the bulls in Pamplona, Spain.

(Daniel Ochoa de Olza / Associated Press)

A reveler falls while others run from Jandilla fighting bulls during the running of the bulls of the San Fermin festival in Pamplona, Spain.

(Daniel Ochoa de Olza / Associated Press)

An injured runner is attended by medical personnel after he was gored by a Jandilla fighting bull at the running of the bulls at the San Fermin festival, in Pamplona, Spain.

(Alvaro Barrientos / Associated Press)

Revelers from around the world arrive in Pamplona, Spain, every year to take part in the eight days of the running of the bulls.

(Andres Kudacki / Associated Press)

Revelers open their mouths as they wait to cool off with water thrown from a balcony to celebrate the official opening of the 2015 San Fermin fiestas in Pamplona, Spain.

(Andres Kudacki / Associated Press)