YELM, Wash. (KOMO) -- The Thurston County Sheriff's Office is investigating the shooting death of a pet dog owned by actress Salma Hayek. 
 
 Hayek announced on Instagram that she was mourning the death of her pet dog, found shot dead on her ranch near Yelm on February 19. 
 
 "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," the 49-year-old actress wrote. 
 
 According to Lt. Cliff Ziesemer with the Sheriff's Office, groundskeeper Jody Littlejohn was on horseback when she took Hayek's two dogs out for run that day. Mozart ran off, which Littlejohn said isn't unusual on a ranch that size. 
 
 It is unclear whether Mozart ran onto someone else's property, but Ziesemer believes the dog may have, and was shot with a pellet gun by the property owner. 
 
 A .177 caliber bullet nicked an artery, and as Mozart ran back onto Hayek's property, the dog collapsed and died. He was found by Littlejohn who went to look for him. 
 
 Ziesemer called the fatal shot "a fluke" that wouldn't have normally killed a dog. He believes whomever fired the pellet gun was most likely just trying to scare Mozart away. 
 
 Hayek was in Los Angeles at the time of the shooting, but Mozart lived on the ranch full time, Ziesemer said. 
 
 Investigators are going back Sunday in hopes of finding the shooter. 
 
 No charges are expected to be filed unless something drastic changes, Ziesemer said. ||||| Salma Hayek is mourning the death of her beloved dog. 
 
 The 49-year-old actress took to Instagram on Friday to reveal the sad news that her dog, Mozart, was found fatally shot last week. 
 
 PICS: Stars and Their Adorable Pets 
 
 "I haven't posted for a week as I [have] been mourning the death of my dog, Mozart who I personally delivered out of his mother's womb," Hayek wrote on Instagram, along with a sweet snap. 
 
 "He was found dead in my ranch last Friday with a shot close to his heart," she continued. "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." 
 
 Hayek ended the note, which was also written in Spanish, with this declaration: "He didn't deserve a slow and painful death." 
 
 RELATED: Salma Hayek Cut Off a Lot of Hair for Her New Movie 'Drunk Parents' 
 
 The actress, whose Instagram is filled with adoring pics with her animals, shared a photo of her cuddling with one of the canine co-star on the set of Drunk Parents earlier this month. 
 
 "I love dogs so much that I can't resist cuddling with them – even when they've helped arrest me in the movie we're shooting!" Hayek captioned, with the hashtags "#love," "#dogs" and "#cuddle." 
 
 Last July, Hayek was one of several A-listers outraged over the killing of Cecil the Lion. Watch the video below to hear what she had to say exclusively to ET.
– Actress Salma Hayek has delivered sad and surprising news to her fans on Instagram: Someone shot and killed her 9-year-old dog, Mozart. "He was found in my ranch last Friday with a shot close to his heart," she writes. It's not clear what happened, and Hayek says she hopes authorities in Washington state can track down the shooter. Mozart had never attacked or bit anyone, writes Hayek, who adds that she "personally delivered" Mozart from his mother's womb. ETOnline notes that Hayek regularly fills her Instagram account with loving shots of Mozart and her other animals.