UPDATE: We are now in a position to confirm a man injured at a Newcastle store this morning (Friday) has died.
The family of the 50-year-old, from Stoke-on-Trent, have been informed and are being supported by specially trained officers.
An investigation to understand the circumstances of what happened is now underway. The death is not being treated as suspicious and a report will be prepared for HM Coroner.
Nobody else was injured in the incident.
The shop will remain closed for the rest of the day.
Anyone with information, or who saw the man in the vicinity of the store, is asked to call Staffordshire Police on 101 quoting incident 124 of February 12.