A police officer in Fullerton fatally shot a man who brandished a pellet gun at law enforcement Saturday night, the department said. Officers were alerted of an armed man threatening a family member and responded to the 700 block of W.

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.

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.