National police commissioner General Bheki Cele, addressing mourners at the funeral of two flying squad members who were killed last weekend, urged officers to use their guns to protect themselves against violent criminals.

"When you see a criminal pointing a firearm at you, do not smile as the gun he is holding is not a camera, shoot first to protect yourself," Cele told a packed hall at the Vosloorus Civic Centre, east of Johannesburg.

Cele was speaking during the joint funeral service of warrant officers Lefu Mokoena, 45, and Bhekuyise Mahlalela, 47.

The two died after being shot when they stopped to assist the occupants of a broken-down vehicle in Katlehong, on the East Rand.

Cele said police officers should not die while holding their firearms.

"SAPS is not a burial society that buries police every weekend, we need to stand up and fight these criminals and we shall win," he said.

At least 56 police officers have been killed since January. On Friday, Police Minister Nathi Mthethwa unveiled a plan of action to tackle the high number of police deaths at the hands of criminals.