A thug followed a stranger into a Queens deli and repeatedly stabbed him in the buttocks, cops said today.

The assault, seen on shocking surveillance footage, occurred inside the store on 63rd Road in Rego Park around 5:45 p.m. Sunday.

The video shows the thug – wearing a white T-shirt, grey sweat pants and a black cap – enter the store before quickly pouncing on his unsuspecting victim and violently stabbing him in the buttocks several times before bolting from the store.

Police said there doesn’t seem to be any motive and that the attack was completely random.

The victim was treated for his injuries and is in stable condition, cops said.