Video shows woman throwing dog over University Veterinary Center clinic fence in plastic bag in Anaheim, California

ANAHEIM, Calif. -- An investigation is underway in Anaheim, California, after a woman was caught on video throwing a small dog over a fence.

The incident happened early Wednesday morning.

Surveillance video shared by the University Veterinary Center shows the dog inside a plastic bag being tossed over a fence, landing into the backyard area of the clinic.

The dog was found seriously injured by the veterinarian the following morning.

"I can't find words to describe why anybody would do something like that, and it's hard to find the right words," Dr. Ash Hakhamian said. "I mean, thrown is an understatement. He sustained mental trauma, even far beyond his physical trauma."

Hakhamian was surprised when he discovered the dog in the back of his clinic. At first, he didn't know how the do