(CNN) -- A bull leapt out of a bullfighting arena in northern Spain and rampaged through the crowd, injuring at least 30 people, local media reported.

A video shown on Spanish television showed the bull charging through the crowded stands, knocking over spectators at an arena in the town of Tafalla in the Navarra region on Wednesday evening.

The incident happened during a performance meant to showcase the acrobatic prowess of bulls, rather than a bullfight, and children were among those in the audience.

Diario de Navarra newspaper reported that eight people were admitted to hospitals in nearby Pamplona because of injuries suffered during the rampage. The most seriously injured was a 10-year-old boy who was trampled and suffered abdominal injuries. A woman, 23, suffered spinal injuries. A 47-year-old man was gored, but has since been released from the hospital.

The bull weighed more than 500 kilograms (1,110 pounds). About 3,500 people were packed into the arena, according to the newspaper.

Eventually, employees of the bullring managed to corner the bull, before restraining and killing the animal.