Omg, this is just awful!
We can't even imagine what his family is going through!
A 6-year-old boy, Nephi Selu, was playing in his family's backyard in Union City, CA.
A family dog was outside as well and it's believed that Nephi tried to climb up onto the dog's back.
That's when the pit bull mix attacked and bit the boy on top of his head.
He was treated at the scene and then rushed to the hospital, where he was pronounced dead.
The dog is currently quarantined at an animal shelter.
Our hearts and thoughts go out to the family of this poor child.
Check out the video (above) to learn more about this sad, sad attack.