ALVA, Okla. (KFOR) — Northwestern Oklahoma State University is closing the campus and canceling classes for Thursday morning after a "questionable substance" was found in the science building. NWOSU says the substance was discovered by members of the Natural Science Department while conducting a chemical inventory on Wednesday. Experts were then contacted and determined the unknown substance was potentially dangerous. As a result of the incident, NWOSU is closing all campus locations on Thursday, January 16, until 11 a.m. while a crew removes the substance from the building. The university added that, at this time, the situation is contained and night classes will take place. The full statement can be read below. This afternoon, Northwestern was made aware of a potentially dangerous situation. Our Natural Science Department was conducting a chemical inventory when they found a questionable substance. Experts were contacted and they determined that the potential for danger did exist. At that point, we engaged our emergency procedures process. The safety of our campus is our top priority. Out of an abundance of caution, we will be closing all campus locations on Jan. 16 until 11 a.m. while a professional team removes the substance from our Science Building. Northwestern is grateful to our local partners in the Alva Police Department, Alva Fire Department, Oklahoma Highway Patrol and Woods County Sheriff’s Department who acted quickly and were instrumental in assessing and containing the situation. At this time, the situation is contained and night classes will take place. Northwestern Oklahoma State University