Cops are looking for two heartless attackers who allegedly socked an elderly woman in the face at a Bronx supermarket because of a misunderstanding on the check-out line, police said on Sunday.

The 70-year-old victim was on line at the Key Food store on Jerome Avenue near West Gun Hill Road in Norwood around 12:30 p.m. on Sept. 28 when she realized she forgot something and told the cashier she needed to quickly grab it.

The woman encouraged the cashier to take other customers in the meantime.

Two men approached the check-out counter just as the woman returned, passed the duo and put the new item down on the conveyor belt, cops said.

The men, assuming that the woman was trying to cut the line, started arguing with the victim before each of them punched her once in the face.

Cops say the suspects, seen on surveillance video carrying what appear to be grocery bags, were in their late teens or early 20s.