Autopsies were done on Carol and Frank Kay.
They were well-known as the owners of The Callicoon Flea Market.
Both died when propane caused their home in Damascus Township to explode and catch fire.
The coroner lists the cause of death as carbon monoxide poisoning.
The deaths have been ruled accidental.
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.