One runner was gored in the leg, and three others sustained fractures as they were chased by bulls along the half-mile course, part of the eight-day Feast of San Fermin celebration.
The event, in which thousands of white-clad runners attempt to avoid the charge of about a dozen bulls through a restricted section of the city, is the most famous of similar bull runs in Mediterranean towns. Its prominence is largely due to its mention in Ernest Hemingway's novels "The Sun Also Rises" and "Death in the Afternoon."
Although injuries are common, the Pamplona run has resulted in only 15 deaths since 1910.
Notable deaths of 2014 [PHOTOS]