Texas A&M University locked down its main campus Thursday after a report that a suspected gunman had been spotted near the student union.
University spokesman Lane Stephenson said campus police were investigating but have not found any armed suspect so far.
A campus bus driver was on his route around 4 p.m. when he reported seeing an individual carrying a weapon, possibly a rifle, near a building next to the student union.
The university's emergency notification system, called "Code Maroon," sent texts and e-mail telling students, faculty and staff to remain indoors while police searched for the suspected gunman.
About two miles away from where the suspected gunman was spotted, the university was to hold an event where former President George H.W. Bush and his wife Barbara were hosting former first lady Laura Bush at the George Bush Presidential Library Center.
Stephenson said the report of the suspected gunman would not affect the Bush event.