Bulls gored an Irishman and a Spaniard today, the second day of Pamplona's famous bull run which left five other people injured, officials said.

The 43-year-old man from Ireland was gored through his left leg while the 21-year-old Spaniard was gored in the chest. Both were being treated in hospital, the officials said. An Israeli and an American were among the injured.

The traditional bull run starts daily at 8:00 am along an 825-metre (2,706-foot) course during the nine-day festival which opened Wednesday and ends on July 12.

An 18-year-old Australian from Melbourne and a 20-year-old Spaniard from the northern city of Saragossa were hurt on the first day. Officials said the Australian was still in hospital Thursday but no details were released about the extent of his injuries.

The bull run, popularised by Ernest Hemingway's 1926 novel "The Sun Also Rises", involves runners trying to outrace six bulls released every day to run from their corral through the old town's narrow, cobbled stone streets.

The bull runs have claimed 15 lives since 1911 and each year dozens of runners are injured.

The festival also features a range of concerts, street parties and dances, and the revelers' nightly ritual of spraying each other with red wine.