20 children injured after stairwell collapses in San Diego

Officials respond to the scene where a stairway collapses injuring around 20 children on Nov. 11 2017

- Dozens of children were injured Saturday when a platform collapsed at an indoor entertainment complex in California.

San Diego Fire-Rescue announced on Twitter that a stairway collapsed at Vault PK on Saturday night.

San Diego medical units transported four children in serious condition to a nearby hospital, with one suffering from a possible spinal injury. Authorities said parents arrived at the scene to be reunited with their children.

Parent Zachary Smith said his son was lining up for pizza prior to the collapse, while another witness claimed to see children running up and down from a loft to grab a slice.

Vault PK specializes in parkour, a sport that requires athletes to complete obstacle courses often by launching themselves from structure to structure. "Luckily I didn't get hurt", he said.

"We are sad to report that we will be closed for the time being", the gym wrote on Facebook. "I️ am just as devastated for all the children affected as any other parent". Other people with minor injuries left on their own, rather than be taken by ambulance, he said. On the particular night that the incident took place the gym was open for children between the ages of five and 14. Following the incident, one of their children called them up, and that is when they rushed back to the facility.

"It was a freak accident", Smith said.

"It was business as usual until we heard a loud boom come from the gym, at which point our staff and some customers ran over to the gym to help any way we could", the company said in a statement.

Firefighters are now working to investigate how the platform collapsed, and whether it was built to sustain such a weight of people.

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