Marie Marseille celebrating New York Knicks win ended in tragedy when Los Angeles Police Department (LAPD) officers fatally shot her dog.

The Golden Retriever-Saint Bernard-poodle mix who was In Knicks Jersey was mistakenly Shot By Police After Neighbour mistook jubilation for distress.

The police allegedly rushed to the Canoga Park apartment after a neighbour called them thinking the woman’s loud cheering was someone screaming in distress.

The dog owner was watching the game at Jordan Avenue condo when the Knicks clinched the title.

According to the LAPD, the dog was by her side and barking. The officers asked her to secure Jameson, and she reportedly closed the door briefly. When she reopened it, LAPD said Jameson exited and “charged” at one of the officers, prompting an officer-involved shooting.

Marseille says she was trying to put the dog away, but he slipped past and simply walked toward the officer, wagging and energetic, not aggressive.

“We were just so happy. We were just so happy. We were just celebrating the Knicks. We were f**king celebrating the Knicks,” the woman screamed.

“Jameson wasn’t baring his teeth, he wasn’t growling, he wasn’t aggressive, he wasn’t barking. He was just moving toward the officer,” Marseille told Fox 11.

According to the report, Raymon Alvarez, who lives across the street, told ABC7 that when he was going for a walk, he heard the screams.

“The screaming I heard was like, ‘Ah! Oh my God! Oh my God!’ Like just, pure screaming,” Alvarez said as quoted, further adding that he heard gunfire.

“I didn’t think they were gunshots at first because this area is not really known for any sort of gun violence,” Alvarez added

The neighbour who made the 911 call told local media they now feel guilty but believed they were reporting someone in trouble.