Johannesburg - The killing of two toddlers in Diepsloot, northern Johannesburg, was shocking and heart-breaking, the ANC said on Tuesday.
"We believe that the killing of kids is senseless and immoral, it is an act of those who are insane and heartless," said African National Congress Gauteng spokesman Dumisa Ntuli.
"We condemn the brutal killing of the two innocent children and we call upon the (SA Police Service) to act swiftly to apprehend the killer."
The ANC sent its condolences to the children's families and relatives, and urged parents and communities to be extra vigilant to avoid similar killings.
The girls, aged two and three, were found dead in a toilet cubicle by a resident on Tuesday morning.