A section of Knut officials has stormed the union headquarters demanding the removal of secretary general Wilson Sossion.
Riot police had to be called in to manage the situation from getting out of hand.
Sossion on Wednesday directed the closure of the union's offices from August 28 to September 3.
He added that the constitution allows him as the secretary general to postpone the National Executive Council meeting.
" Within my power as secretary general given by the constitution, I did postponed the NEC meeting," Sossion said.
Knut's NEC meeting had been scheduled for Thursday 29th, only to be called off by the secretary general on Monday 26.