A crazed woman stabbed an elderly man to death when a scuffle turned violent at a Bronx bodega Friday, cops said.

Madelyn Tamarez, 31, knifed the 70-year-old victim in the torso around 12:20 p.m. at the Sam Aden Deli on Westchester Avenue near Commonwealth Avenue, police said.

The two — who knew each other — had been arguing, but the subject of the dispute was not known.

Witnesses told PIX 11 that Tamarez had accused the victim of being racist.

“She fight him hand-to-hand,” Sam Aden, whose father owns the store, told the station. “She grabbed a knife from somewhere else. She stabbed him two times and he died.”

He was rushed to Jacobi Medical Center, where he was pronounced dead. His name had not been released as of Saturday morning, pending family notification.

Friends told PIX 11 that he was an Army veteran who had lived in a vets’ home around the corner from the store for 17 years.

“He was a good guy,” Aden said. “I know him long time. He would come to the store every day and relax, drink coffee, talk.”

Tamarez — who lives just blocks from the bodega — was arrested and charged with murder, manslaughter and criminal possession of a weapon, cops said.