"It is alleged that the suspect accused his wife of cheating and after a heated argument, he then stabbed and chopped her with sharp instruments. The victim died on the spot. Angry community members pursued the suspect, caught him and started beating him up," he said.
Mojapelo said the police were called and the 45-year-old suspect was taken to hospital where he was admitted and placed under police guard.
His family said that the man, who cannot be named until he appears in court, returned home very angry on Friday.
His cousin said the man accused his girlfriend of cheating after coming back from her place on Friday.
"He didn't say much because he was drunk. The next day, he invited her to his mother's house and argument ensued in the house," she said.
"The incident shocked us, we didn't think he was capable of something so horrible. They were not staying together, she only came to visit."
The cousin said the pair had been dating for five years.
Provincial police commissioner Lt-Gen Nneke Ledwaba condemned the incident and violent behavior when dealing with domestic issues.
"The SAPS will deal decisively with any perpetrators of gender-based violence and this arrest should send a strong message about our determination to stamp it out."
MEC for social development Nkakareng Rakgoale said: "The very sad state of affairs cannot continue. We simply can't comprehend what drives some men to do this to the very people they have vowed to protect and love.
"The impact on families, especially children, in such cases, is just too huge to comprehend. Men need to understand their boy children will emulate their actions and therefore, we need men to take the biggest stand against this scourge."