A pickup truck drove into a crowd of protesters calling for a higher guaranteed minimum wage on Tuesday in Flint, Mich., injuring several people, The Associated Press reported. 

Flint Police Chief Tim JohnsonTimothy (Tim) Peter JohnsonCornell to launch new bipartisan publication led by former Rep. Steve Israel Trump faces tough path to Fannie Mae, Freddie Mac overhaul Several hurt when truck runs into minimum wage protesters in Michigan MORE told the AP that the crash is believed to be an accident, and that the driver of the pickup truck was “pretty shaken up.” Eight people were hospitalized as a result of the incident, Johnson said.

The car plowed into the crowd shortly after 7 a.m., when it was still dark outside. Protesters had gathered outside a McDonald’s in Flint, according to a local CBS affiliate.  

Michigan gubernatorial candidate Gretchen Whitmer (D) was among those in attendance, tweeting that she was "incredibly sad that so many people were hurt."

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Whitmer is running against Republican nominee Bill Schuette, who is currently the state’s attorney general.

The protest was organized by Fight for $15, a group aiming to increase the minimum wage to $15 nationwide. 

Amazon announced earlier Tuesday that it intends to increase its hourly minimum wage to $15 per hour for its employees. That company has been subject to intense criticism from Sen. Bernie SandersBernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome MORE (I-Vt.), who, along with progressive Democrats, has advocated for a higher federal minimum wage.