76-year-old Harvey Cashwell and his 66-year-old wife, Carolyn Cashwell, were found inside their home in the 28000 block of Liden School Road in Greenwood around 5:30 p.m. on Thursday.
Police had been called by neighbors who said they were concerned because they had not seen the couple or observed any activity at the home in days.
Investigators said the details of this case, including the manner of death, were not being released because of the ongoing investigation.
There was no word on any arrests or suspects in this case.
Police ask anyone with information to contact Detective William Porter at 302-531-5892 or Delaware Crime Stoppers at 1-800-TIP-3333. Information may also be provided via the internet at www.tipsubmit.com. Also, you can send an anonymous tip by text to 274637 (CRIMES) using the keyword "DSP."