2016 Running of the Bulls in Pamplona, Spain

Four people were injured but no one was gored as thousands of thrill-seekers tested their agility and courage by racing alongside fighting bulls through the streets of this northern Spanish city in the first bull run of the San Fermin festival, according to a hospital official.

Runners dash along with six bulls down a narrow 930-yard course from a holding pen to Pamplona's bull ring.

The nine-day fiesta became world famous with Ernest Hemingway's 1926 novel, "The Sun Also Rises," and attracts thousands of foreign tourists

Time lapse:Revelers run beside Fuente Ymbro fighting bulls during the first running of the bulls at the San Fermin Festival, in Pamplona, Spain.

Coming through: 'Mozos' or runners, participate in the first bull run of the Fiesta de San Fermin.

Morning run: On each day of the festival, six bulls are released to run a course through the narrow, cobbled streets of the old town. Ahead of them are the runners, who try to stay close to the bulls without falling over or being gored.

Bull-selfie: A reveler is tossed as he tries to get a snapshot next to a cow in the bullring after the running of the bulls in Pamplona.

Higher ground: A reveler climbs on to a balcony before the start of the running of the bulls.

Danger zone: The festival, locally known as Sanfermines, is held annually from July 6th to 14th, in commemoration of the city's patron saint and hundreds of thousands of visitors from all over the world attend the fiesta.

Gotcha: Participants try to out-run a fighting bull.

Up-ended: A reveler is thrown by a cow in the bullring after the running of the bulls.

San Fermin: Spectators watch from balconies as the statue of San Fermin is carried through the center of Pamplona.

Spectacle: Spectators watch from balconies as participants run ahead of the bulls on the first day of the San Fermin bull run.

Street scene: People dance and sing during the Riau-Riau procession of the San Fermin Festival in Pamplona.

Religious procession: A young boy touches the nose of a cabezudo, a member of the San Fermin Comparsa Parade, during a religious procession.

Parade: People carry a statue of San Fermin during a procession in the northern Spanish town of Pamplona.

Patron saint: The image of San Fermin, patron saint of Pamplona, is carried during a tribute procession.

Big night: Two young women who spent the night drinking sleep it off in a doorway before the running of the bulls.