Their remains were discovered yesterday in their one-room apartment at Ago-Oba.
The injuries on their heads suggested that they might have been hit with an iron rod. Their beddings and the floor were stained with blood.
The police released their remains to their family after a post-mortem .
Police spokesman Olumuyiwa Adejobi said two suspects, who were arrested and questioned, have been released.
The late Mrs. Musuru’s son, Saburi Moshood, said: “We arrived the family home without knowledge of the killing and started suspecting that something was wrong from the way residents were greeting us.
“We went to our mother’s room and found her lifeless body and that of her grandchild on the floor. When the police came, they discovered the iron rod that was used to kill them and took it away as exhibit. They also took the bodies away, but later released them to us. We have buried them.
“What will we come here to do again? Our mother and her grandson were killed here. There is no reason to look back when we leave.”