Officials said students have been robbed three times in less than two weeks and in two of the incidents the men pulled guns.
In one robbery, a student said he was robbed inside a classroom building on Wednesday.
The student said he was walking out of a restroom when two men ambushed him just before 2 p.m., police said.
He said one man grabbed him by the neck and the other threatened to shoot if he moved, police said.
No injuries were reported.
Anyone with information is asked to contact the Georgia State University police at 404-413-2100 or the police tip tine at 404-413-3211.