Today started off as a normal one till around 8am when it was reportedly said that the school gates had been closed. Rumours had it that NASU (Non Academic Staff Union) members, UI chapter, were on a strike. Later, another set of rumours said SSANU and NAAT were the ones embarking on the protest.
But for the fact that some non-academic staff members like the University Health Service (Jaja clinic) were at their duty post, one could well enough say NASU staged the protest.
The protest was quite peaceful and hardly would anyone who had no reason to access the gate know anything happened. However, most departments had one or no lecture throughout the day.
As at now, the cause is yet to be ascertained and this is therefore still in course. It would be recalled that students have once had to spend some weeks at home. Hence, the relevant constituted authorities should kindly meet their demands to avert a total and comprehensive strike action.

Linda Ikeji writes more on this here:
https://www.lindaikejisblog.com/2017/11/non-academic-staff-shutdown-university-of-ibadan-with-protest-2.html