The “massive” fire burned throughout Saturday night till the early hours of Sunday morning, with firefighters battling to keep it under control.
The footage, which has the date stamp of July 17, showed the girl waddling into the gas section of the supermarket at about 7 pm.
She kept scanning around furtively to be sure nobody was watching, then picked up a lighter and strike it.
She waited for the fire to catch on before she disappeared back where she came from.
The blob of fire she left behind exploded leading to an inferno that engulfed the supermarket.
In another video that shows the young girl during interrogation, she confessed that her mother took her to the supermarket.
The girl said her mother wanted to buy drinks for her sister at another section of the supermarket before she left them for the gas section in the supermarket.
