Police did not find any explosives after a three-hour search of the building.
Police say they believe the three victims may have been shooting at each other, but are still investigating.
The shootings happened in the same place and almost within 24 hours of each other.
Police said the shooting was an accident and no arrests have been made.
No arrest has been made following Friday morning's TU Alert.
A trial date has not been set in the case.
Police say there is no information on the shooter or motive.
Police sent two TU Alerts to students Friday evening and early Saturday morning.
Police are still investigating the fatal shooting of Antonio Miller on Jan. 16.
Five juveniles entered the club men’s gymnastics team’s gym in January, causing thousands of dollars in damages.