Police arrested and detained them at the Oke Odo Police Division for alleged murder, after the boy’s mother reported that their negligence led to the death.
The boy was reportedly taken to a private hospital in the area where he was confirmed dead.
It was learnt that Mary’s family did not believe the account of the grandmother as they insisted that there was more to the death than meet the eye, adding that the Ajakaye family had a case to answer.
The police subsequently arrested the grandma, Sunday and another relative who reportedly raised the alarm when the boy went missing.
The Police Public Relations Officer, SP Dolapo Badmos, said the boy’s corpse was in the mortuary pending the release of the autopsy report.