The incident was said to have happened on Sunday in the Meiran Alagbado area of Lagos state after neighbours heard the shout of the girl in the woman’s apartment.
On getting to the apartment to ascertain the cause of the shout, the neighbours managed to force open the woman’s door and found the underage maid bleeding profusely while still doing some domestic chores.
A neighbour who witnessed the scene said the girl told them that her madam was in the habit of using crude items on her anytime she is beating her.
She said: “While the girl was trying to escape, the woman used the saw to inflict that injury on her.
“Not bothered with the blood flowing from the girl, the woman still forced the maid to wash clothes with the same hand.”
The matter was later reported to the Meiran Police Station by the aggrieved neighbours, leading to the woman’s arrest and detention.