Mariah Thomas of Kansas City, Missouri, has been charged with endangering the welfare of a child.

Police responded to a report of an infant not breathing on Friday afternoon.

A probable cause statement said responders found the child with apparent burns.

The baby was pronounced dead at the scene.

The statement said responders were told by a witness the mother "put the child down for a nap and accidentally placed her in the oven instead of the crib".

It did not explain how that mistake was made.

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"We acknowledge the gruesome nature of this tragedy and our hearts are weighted by the loss of this precious life," Jackson County prosecuting attorney Jean Peters Baker said in a statement.

"We trust the criminal justice system to respond appropriately to these awful circumstances."