Motty’s Supermarket on 19 Main Street in Monsey was engulfed in flames around noon on Thursday.
A member of Rockland Shomrim told Hamodia the cause was a gas explosion.
As of 1:30 PM, firefighters were still struggling to contain the fire.
The supermarket, made out of wood like most structures in Monsey, was destroyed.
Chasdei Hashem, no one was hurt.