PAMPLONA, Spain -- Four people suffered bumps and bruises but no one was gored in the fourth day of the running of the bulls at Pamplona on Tuesday.

A local hospital said those daredevils sustained injuries to the head, legs or arm in the relatively clean and fast run through the old quarter of the city. None of the injuries was serious. All four were Spaniards.

The six fighting bulls weighing as much 620 kilos (1,360 lbs) stayed together in a pack for much of the dash, which was good because an isolated bull is more likely to get disoriented and charge at people. They run with steer that are supposed to keep the bulls in a tight pack.

Four more runs remain at Spain's most famous summer festival. Three people – an American and two Britons – were gored in Monday's run but none was seriously hurt.

The festival became world famous after Ernest Hemingway wrote about it in his novel "The Sun Also Rises."

Tuesday was the third anniversary of the last death at the so-called San Fermin festival, that of a young Madrid-area Spaniard, Daniel Jimeno, who was gored in the neck as he tried to slide under a fence feet-first to escape a bull. He almost made it.

His father, Juan Antonio Jimeno, placed a wreath of flowers wrapped in a red kerchief – the garment that perhaps best symbolizes the dress code for San Fermin runners – at the precise spot where his son died in 2009. That was the 15th death since record keeping began in 1924.

The father's voice quivered as he remembered his son. He said the flowers were for him and the other 14 as well.

"I was to pay tribute to all of them, not just my son," Jimeno told Spanish National Television. "This is a hard day."

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Daniel Woolls contributed from Madrid

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  • Revelers run in front of a pack of six El Pilar's ranch fighting bulls during the running of the bulls of the San Fermin festival, in Pamplona, Spain, Tuesday, July 10, 2012. (AP Photo/Daniel Ochoa de Olza)

  • A drunk man sleeps in Estafeta street during the San Fermin festival, on July 10, 2012, in the Northern Spanish city of Pamplona. The festival is a symbol of Spanish culture that attracts thousands of tourists to watch the bull runs despite heavy condemnation from animal rights groups. (PEDRO ARMESTRE/AFP/GettyImages)

  • A man sleeps standing in the street of Estafeta before the fourth run of the bulls of the San Fermin festival, on July 10, 2012, in the Northern Spanish city of Pamplona. (PEDRO ARMESTRE/AFP/GettyImages)

  • A girl rests in a street of the Northern Spanish city of Pamplona, on July 10, 2012, during the San Fermin festival. (RAFA RIVAS/AFP/GettyImages)

  • A man wears a red scarf full of pins during the San Fermin festival, on July 10, 2012, in the Northern Spanish city of Pamplona. (PEDRO ARMESTRE/AFP/GettyImages)

  • Two couples kiss each other as they wait for the fourth Bull Run of the San Fermin festival, in the Northern Spanish city of Pamplona, on July 10, 2012. (RAFA RIVAS/AFP/GettyImages)

  • Revelers wait before running with El Pilar fighting bulls along la cuesta de Santo Domingo on the fourth day of the San Fermin running-of-the-bulls on July 10, 2012 in Pamplona, Spain. (Photo by Jasper Juinen/Getty Images)

  • People wait for the beginning of the fourth run of the bulls of the San Fermin festival, on July 10, 2012, in the northern Spanish city of Pamplona. (PEDRO ARMESTRE/AFP/GettyImages)

  • A young boy wears a mask of a bull at the San Fermin fiesta, in Pamplona northern Spain, Tuesday, July 10, 2012. (AP Photo/Alvaro Barrientos)

  • People eat lunch on the street during the San Fermin festival, on July 10, 2012, in the Northern Spanish city of Pamplona. (PEDRO ARMESTRE/AFP/GettyImages)

  • A man dressed as a giant holds a young girl during the giants and big heads parade of the San Fermin festival, on July 10, 2012, in the Northern Spanish city of Pamplona. (PEDRO ARMESTRE/AFP/GettyImages)

  • A young gild shakes the hand of a man dressed as a giant during the giants and big heads parade of the San Fermin festival, on July 10, 2012, in the Northern Spanish city of Pamplona. (PEDRO ARMESTRE/AFP/GettyImages)

  • People enjoy the San Fermin's Cabezudo, the costumed figures, at the San Fermin fiestas, in Pamplona northern Spain, Tuesday, July 10, 2012. (AP Photo/Alvaro Barrientos)

  • Revelers run in front of a pack of six El Pilar's ranch fighting bulls during the running of the bulls of the San Fermin festival, in Pamplona, Spain, Tuesday, July 10, 2012. (AP Photo/Daniel Ochoa de Olza)

  • Revelers run in front of a pack of six El Pilar's ranch fighting bulls during the running of the bulls of the San Fermin festival, in Pamplona, Spain, Tuesday, July 10, 2012. (AP Photo/Daniel Ochoa de Olza)

  • Revelers run on Estafeta street beside to El Pilar fighting bulls ranch, during the fourth running of the bulls at the San Fermin fiestas, in Pamplona northern Spain, Tuesday, July 10, 2012. (AP Photo/Alvaro Barrientos)