A deadly stabbing erupted in swanky Beverly Hills late Sunday night, leaving one man dead and another injured as detectives scramble to piece together what sparked the bloody alleyway confrontation.

Cops received a report of an altercation involving two men at about 11:39 p.m. Sunday in the alley of the 400 block of North Palm Drive.

Officers rushed to the scene and found a man suffering from a serious stab wound to his neck.

Police immediately rendered aid before Beverly Hills Fire Department paramedics rushed the victim to a local hospital. Despite the efforts to save him, he later died from his injuries.

The other man involved in the…

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