Tragedy occurred on Friday in Isanlu-Isin in Kwara, when a middle-aged man, Taye Ibiwoye, allegedly clubbed his mother to death with an axe, the News Agency of Nigeria (NAN) reports.
The deceased identified as Sarah Ibiwoye, who was said to be in her late 60s died instantly from the attack which shattered her skull.
The community was further thrown into mourning when another elderly woman, simply identified as 'Iya Eleja' slumped and died when the news of Sarah's death was broken to her.
It was learnt from the people of the community that the accused was mentally derailed and had been under treatment for sometime.
Some sources, who preferred anonymity, said that Ibiwoye had complained to the policemen who came for his arrest from Oke-Onigbin that his mother was behind his travails.
He was also said to have told the policemen that while his brothers were living comfortably, he was rotting away in abject poverty because of his mother's action.
A relation to Iya Eleja, told NAN on condition of anonymity, that the woman was hale and hearty before the unfortunate incident.
"We have just come back from Omu-Aran where we went to buy the woman's coffin. There was nothing wrong with Iya Ejeja who was hale and hearty before the news was broken to her.
"Immediately the news of the incident was narrated to her, she slumped and died," the source said.
The Divisional Police Officer, Oke-Onigbin Police Command, DSP. Mr Olutekunbi Ekundayo, told NAN that the case would be transferred to the State CID Headquarters in Ilorin for investigation.
"There is not much we can do here as far as this case is concerned, particularly as regards the issue of the accused person's state of health.
"Though, it was a case of a culpable homicide but as you can see now, I am preparing the file for the transfer of the case to the State CID for appropriate investigation," he said.