The campus has been closed because an "armed fugitive" was "spotted in the Athens campus vicinity has not been apprehended," Ohio University's website says.
The game between the Bobcats (15-5, 6-0 Mid-American Conference) and the Eagles (10-10, 3-3 MAC) was scheduled to tip off at 7 p.m. ET.
The game has been rescheduled for 7 p.m. on Feb. 20.
Ohio University officials had called in extra police officers and notified students Wednesday morning following an armed robbery at an apartment complex near campus. The school says the suspect allegedly had a handgun and fled on foot in the direction of the university.
The university was expected to reopen Thursday.
Information from ESPN.com's Andy Katz and The Associated Press contributed to this report.