"Our local field office is working with their law enforcement partners to determine the exact circumstances that led up to this incident. The Secret Service will provide further details as warranted once additional facts surrounding the situation are known," said spokesman Robert Hoback.
The Valdosta student protest came after Trump also spent part of the day trying to clean up a racially charged controversy after he refused to disavow former Ku Klux Klan grand wizard David Duke over the weekend.
When asked about his Sunday comments on CNN's "State of the Union," Trump blamed a "bad earpiece."
"I was sitting in a house in Florida, with a bad earpiece," the brash billionaire told NBC's "Today" show. "I could hardly hear what he's saying. I hear various groups. I don't mind disavowing anyone. I disavowed Duke the day before at a major conference."
Duke had detailed his support for Trump in a Facebook post on Thursday.