Deputies were dispatched to the Pirates Wood neighborhood around 2 a.m. after a report of a home invasion, Leeper said. When they arrived at Doubloon Way — a street off Blackrock Road about five miles north of State Road 200 — they heard gunshots coming from inside a home while they were assessing the scene.

The deputies returned to their patrol vehicles to retrieve rifles, Leeper said, and then spotted a man running through the woodline away from the house. The man turned and fired at the deputies with a handgun, according to the sheriff. The deputies returned fire with their rifles.

Despite first aid at the scene, including tourniquets applied to the man's arm and leg, he died at the location, Leeper said. No deputies were injured.

When deputies entered the home, they found a man dead from gunshot wounds and a woman who was unharmed. Leeper said the evidence indicates the adult son shot and killed his father before fleeing the home and being killed in the exchange with deputies.

The Florida Department of Law Enforcement is investigating the deputy-involved shooting, while the Sheriff's Office is handling the domestic shooting investigation, Leeper said.

The deaths have shaken residents of the quiet residential area, where the sheriff's office set up a mobile command unit at the scene. The names of the father and son have not been released.

Anyone with information about the case is asked to contact the Nassau County Sheriff's Office.