Authorities are investigating the deaths of an elderly couple in Renton as a double homicide.

King County Sheriff's spokeswoman Sgt. Cindi West says officers located the bodies of an 82-year-old man and his 80-year-old wife around 6 p.m. Saturday inside their home after a woman reported she found her parents dead. Their names were not released.

Police described the deaths as homicides but did not provide other details.

West says that the victims' grandson - 26-year-old Michael L. Boysen - is being sought but not in connection with the deaths. She says that he was at the residence Saturday night and is now unaccounted for.

Police are also searching for the victims' missing red, 2001 Chrysler 300.