Moment hero shop worker fights off knife wielding attacker with a MOP

This is the moment a hero shop worker fights off a knife-wielding attacker with a MOP.

Mareez Bachu hid the huge blade in a pizza box before ambushing the man as he cleaned his floors.

Dramatic footage showed the 20-year-old waving the knife around as the unnamed worker fought him off with a mop.

Bachu then slashes at him - forcing the victim to also pick up a wet floor sign in a bid to protect himself.

Moments later, three men can be seen entering the shop in Plymouth, Devon, unaware of the horror taking place inside.

Bachu then lunges at the teens and chases them out while still clutching the weapon.