Update, 3:30 p.m: Authorities have identified the dead couple as Albert and Sandra Ballard of Parkvale Road in Rockville. Albert Ballard was 80 and Sandra Ballard was 74.

Original Post:

Montgomery County police detectives are investigating what appears to be a murder-suicide at a Rockville nursing home, authorities said.

A police car was parked at the entrance to the National Lutheran Home on Monday in Rockville. (Dan Morse/The Washington Post)

“We are investigating this as a murder-suicide,” Innocenti said.

Police also were called to the home for an electrocution, but that was unrelated and police have not found any victim of that incident, authorities said.

Police have not released the names of the couple. The woman was classified as a short-term rehabilitation patient. There are about 350 residents of the facility.

[This post has been updated.]