Engcobo has made headlines since last week when a gang ambushed a local police station and shot several police officers and stole firearms. The suspects were later found at a cult church called Mancoba Seven Angels Ministry.
The Police and Prisons Civil Rights Union (Popcru) expressed its condolences over the deaths.
"The Police and Prisons Civil Rights Union (Popcru) is saddened by yet other losses of lives of police officers who were part of the investigative teams that were deployed to eNgcobo in the Eastern Cape. It is with deep sadness that our officers perish under such circumstances‚" the union said in a statement.
"It is understood that while doing their work in the early hours of this morning‚ they got involved in a fatal car accident that took the lives of three officers‚ with one being in a critical condition. We would like to send our sincerest condolences to their colleagues and families in the North West province‚ and wish the injured officer a speedy recovery."