Palm Beach County Sheriff's office spokeswoman Teri Barbera said in a statement yesterday that the incident happened Friday around 1:45 pm.
Officers assisting the U.S. Secret Service reported that a vehicle in the motorcade had been struck by what was believed to be a small, hard object.
Several members of the motorcade returned to the scene after completing the motorcade to look for witnesses and objects along the roadway.
A child from a local middle school confessed to throwing the wood at the motorcade and also implicated four additional students.
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