Mr Kamilu said the suspect, a teacher at a private school in Maiduguri, had been apprehended last week.
The French embassy in Nigeria has called for an end to discrimination against women and girls.
The union members staged the protest following the ‘No Work No Pay’ policy and court order that mandated the lecturers back to classes.
The workshop was organised by NLC and supported by the International Labour Organisation(ILO).
Mr Nwabuzor said preliminary investigation revealed that the students were the prime suspects of unrest caused by some students at the all-girls school on Thursday.
FIFA had said before the tournament that the colours, a symbol mainly for the LGBTQI+ community, would be allowed in the eight stadiums for the tournament.
Millions of Nigerians are plagued by multidimensional poverty.
“They literally do two shifts without being paid just to make Nigerians happy and satisfy our applicants.”
Primary health centres in Nigeria are usually in decrepit state.
The mass grave contains at least 30 corpses believed to be trafficked immigrants from Ethiopia.
