Republican presidential candidate Ben Carson canceled the remainder of his campaign events Tuesday after a fatal car crash involving staff and volunteers. 

According to the campaign, a van carrying three volunteers and a campaign staff member slid on an icy Iowa road and flipped on its side near Atlantic, Iowa. It was then hit by another vehicle.

One volunteer, 25-year-old Braden Joplin, was transported to the University of Nebraska Medical Center in Obama, Neb. where he died Tuesday around 4:30 p.m., according to a statement from the campaign. 



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"Carson plans to meet with Joplin's family members once he arrives in Omaha later this evening to offer his condolences," the campaign said. 

Three of the other passengers in the van are being examined at Cass County Memorial Hospital in Atlantic, Iowa, Carson’s campaign said in a written statement. 

The accident comes less than two weeks before the Iowa caucuses, where Carson is polling fourth behind Donald Trump, Texas Sen. Ted Cruz and Florida Sen. Marco Rubio, according to polling data from RealClearPolitics.