A man has died following an officer-involved shooting in Fullerton. Police were dispatched to the 700 block of W. Orangethorpe Avenue in response to a report of a man armed with a knife, threatening a family member.

Police were called to the home after the man threatened a family member with a knife, police say. The family disputes what led up to the shooting.

A man allegedly armed with a knife — and what turned out to be a pellet gun resembling a Smith and Wesson handgun — was shot to death during a confrontation with police officers in Fullerton, authorities said Sunday.