A 44-year-old local man has been arrested on suspicion of murder, according to police officials.
We are not in a position to identify the victim at this stage, and we urge people respect her family's privacy and to avoid speculation and rumour on social media, the police said.
Police and paramedics were alerted to the scene.
A witness said that she had "never been so scared in my life".
The witness, on the condition of anonymity, stated that she saw the victim lying on the floor and the suspect pinned down as "everyone screamed and ran up and down" the supermarket, reported Sky News. (ANI)