UPDATE (2/29/16): Following our previous coverage of this story, authorities in Washington State have allegedly learned that Salma Hayek's neighbor is responsible for shooting her dog. The dog had reportedly trespassed on the neighbor's property and attacked other animals, so the neighbor used a pellet gun to scare 9-year-old Mozart away without intent to kill him. As TMZ reports:

Cops launched an investigation and tell us Salma's neighbor confessed to shooting the dog, but there were extenuating circumstances. The neighbor told police he was sick of her dogs coming onto his property and attacking his dogs, which he says happened every time Salma's caretaker took the pets for a walk. 

The neighbor told cops... several of Salma's dogs were in his garage on the day in question ... and he used a pellet gun to scare the animals away. The neighbor said he had no intention of killing any of the animals and cops also believe the pellet gun ordinarily would not be lethal.

Authorities have reportedly closed the case. Hayek's reps have yet to comment on the issue publicly.

See the original story below.

People have done some extraordinarily stupid things with a gun in hand—pointing one at children, for example; or bringing one to a job interview. This one's heartbreaking. Salma Hayek took to her Instagram on Friday to share a harrowing report that someone, presumably someone lacking any sense of empathy, shot and killed her beloved dog, Mozart. Who does this?!

In her lengthy post, Hayek reports that Mozart was found dead a week ago "with a shot close to his heart." Authorities in Washington State, where Hayek's ranch is located, are investigating the incident. There's no word yet on what, if any, clear motive could have possessed someone to murder the animal.

I haven't posted for a week as I been mourning the death of my dog, Mozart who I personally delivered out of his mother's womb. He was found dead in my ranch last Friday with a shot close to his heart. I am hoping that the Washington State authorities do justice to this wonderful dog whom in 9 years never bit or attacked anyone. He loved his territory and never strayed away...he was the most loving and loyal companion. He didn't deserve a slow and painful death.

According to Page Six, Hayek's ranch "serves as an animal sanctuary and houses several rescue dogs, horses, alpacas, parrots and other pets."

Rest in peace, Mozart.