Published: Jul 13, 2013 8:37 AM EDT

PAMPLONA, Spain (AP) - The penultimate bull run of Spain's San Fermin festival left at least 23 people injured Saturday, when thrill-seekers fleeing the beasts were crushed at the narrow entrance to the bullring, officials said. Two of the injuries were gorings.
 
As the huge animals thundered into the entrance of the tunnel, they were blocked by a mound of dozens of people who had fallen and were piled on top of one other.
 
One bull that had fallen before the entrance got up and charged into the clogged passageway. Two steers jumped over the pile of people as they began to get up and flee.
 
A gate normally used to let regional police into ringside positions was pushed wide open by a flood of runners, causing an obstruction for others trying to enter the main arena, Interior Ministry regional spokesman Javier Morras said.
 
"We all know that alley is a funnel and a critically dangerous point at the entrance to the ring," Morras said. "Pileups there are one of the biggest risks that can occur in the running of the bulls," he said.