Three governors at troubled Belfast school De La Salle College have quit their positions.
It comes just after it was announced principal Claire White would return to her role after a two-year absence. She was on paid leave after a number of staffing issues at the school.
It is understood staff and parents are considering protesting over the head's return to her position.
In a letter to parents last week the board of governors said it was in agreement and fully supported Mrs White saying it was the right time for her to return.
However, on Wednesday the BBC reported governors Michael Collins, Michael O'Hara and Nuala McCabe resigned their positions.
"Regrettably, I do not feel that the decision taken is in the best interests of pupils," Mr Collins, a governor of almost two decades and former pupil told the broadcaster.
The board of governors said it regretted the resignations.
Parents have expressed concern their children's futures are being risked by turmoil at the school.
"Another fine mess," said one parent.