Police in Chesapeake, Va., say six family members are dead in an apparent murder-suicide after an hours-long standoff. (Reuters)

Six members of a family are dead after a murder-suicide in Chesapeake, Va., about 200 miles south of Washington, police said.

Cameron Dooley, 26, shot and killed five relatives before turning the gun on himself after a standoff with officers that lasted several hours Wednesday, police said. The dead included Dooley’s father, Steven Todd Dooley, 50, a recently retired officer from the Chesapeake Police Department.

The incident began when Chesapeake police were called to a home in the 2300 block of Wildwood Road to check on the welfare of a person shortly after 3:30 p.m. Wednesday, police said. They discovered the suspect’s brother, Landon Dooley, 22, dead inside.

An investigation led officers to a nearby home in the 1400 block of N. George Washington Highway around 7 p.m. Police negotiated with Cameron Dooley, who was armed, for several hours.

Officers later entered the home and found the suspect and other family members dead. They included the suspect’s mother, Lori Dooley, 54; the suspect’s sister, Brooke Dooley, 17; the suspect’s father; and a fifth adult woman who has not been identified.

Police believe the relatives were killed before officers arrived at the scene. The case remains under investigation.