San Diego homicide detectives cordoned a home in San Carlos for hours Wednesday after an apparent murder-suicide shooting involving a wife and husband. The wife, police said, was the husband's caregiver.

At around 10:25 a.m., the San Diego Police Department (SDPD) received a phone call from a relative concerned about the well-being of the couple who lived at a home in the 6600 block of Bell Bluff Avenue.

The caller asked police to conduct a welfare check on their loved ones.

When officers arrived, they made their way inside the house and made a grisly discovery: the wife and husband were both dead.

An SDPD lieutenant told NBC 7 both the man, who was 68 years old, and the woman, 69, had died from gunshot wounds to their bodies.

Police said the wife served as the care provider for her husband. The names of the couple were not immediately released.

All day, detectives could be seen going in and out of the couple's home as they took photographs and collected evidence.

The blinds of the home where the bodies were found were drawn shut; some cardboard boxes lined the path leading to the front door of the home. Evidence markers were placed near those boxes. A night stand was also set aside, outside the home, near the boxes.

Neighbors said the husband had been paraplegic for 26 years and confined to a wheelchair. They described his wife as "dedicated."

The investigation into the possible murder-suicide is ongoing. Anyone with information on this case can call the SDPD Homicide Unit at (619) 531-2293 or Crime Stoppers at (888) 580-8477.