Kansas City police are investigating after someone left a dog in a sweltering car at Kauffman Stadium during a Kansas City Royals baseball game.

The dog was rescued by fans who heard it whimpering when they left a game on Sunday. The fans took the dog, which had no access to food and water, into the stadium and left a note for the car's owner.

As of Monday afternoon, no one had claimed the dog, which is being kept at a shelter. It will be up for adoption if the owners don't contact the shelter within five days.

The Kansas City Star reports one of the dog's rescuers is interested in adopting the puppy.

The penalty for animal cruelty is up to $1,000 or 180 days in jail.