Another Day, Another School Shooting?

Just now, reported, at Oklahoma U. in Norman, shots fired, the usual lockdown, warning from university's official Twitter account, no details, centered on Gould Hall.   One day after fatal Purdue shooting.  More here.  And @UOSooners official. Common scene now in photo.  UPDATE:  School twitter feed now says,  "Normal campus operations have resumed except for Gould Hall where additional checking is continuing."  Likely no shots fired.  Maybe a backfire or something.