Emergency services are responding to an incident in Borland Avenue, Carlisle.
Police were called at 3.37pm today, Monday December 19, following reports of a man threatening people at an address.
Armed officers were sent to the scene, where they found a man in possession of a knife. Shortly after this, a police firearm was discharged.
The man, aged in his 40s, sustained gunshot injuries and was pronounced dead at the scene.
No other members of the public were injured during this incident, which at this stage is believed to be an isolated incident.
A cordon is in place at the address as officers conduct their enquiries. We would ask members of the public not to attend the scene.
There will be increased patrol activity within the Botcherby area throughout the night to help reassure and support the local community.
The Constabulary has informed the Independent Office for Police Conduct.