BBCA customer has been stabbed to death in a bank in a city centre.
The man, who was a customer aged in his 30s, was assaulted inside the Lloyds bank in St Peter's Street in Derby at about 14:30 BST on Tuesday, police said.
The pedestrianised street remains taped off by officers as well as nearby East Street.
An air ambulance landed near Derby Cathedral earlier.
A spokesman for Derbyshire Police said St Peter's Street would remain shut for the rest of the evening.
Anyone with information about the stabbing has been asked to contact police.
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