The first audio recordings surfaced Tuesday morning from 911 calls made during this past weekend's NASCAR crash that sent debris flying into stands and injuring onlookers.

"Yeah, listen - I'm in section zero ... there are two very injured people here. We've been calling for paramedics and no one's showing up," one male caller told a dispatcher.

It's estimated that 32 people were injured as a result of the crash, seven of them still hospitalized. NASCAR plans to do a thorough investigation into what happened.

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