PHILADELPHIA (CBS) — A security officer was struck by a stray bullet after gunfire erupted on the campus of Lincoln University, school officials said Sunday.

Police responded to the shooting around 3:30 a.m. along the 1500 block of Baltimore Pike in Chester County.

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Officials said the there was an alteration on the main campus when shots were fired and a bullet hit a van that was carrying employees of a private security firm hired by the university for homecoming festivities taking place over the weekend.

A female security officer was struck in the arm by a stray bullet. She was taken to Christiana Hospital in stable condition.

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School officials said no students were injured in the shooting and none were involved in the incident.

Pennsylvania State Police were assisting Lincoln University Police with their investigation.

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Anyone with information is asked to call Lincoln University Public Safety at 484-365-8139.