An apparent murder-suicide near Arlington’s Fairlington neighborhood — the county’s first homicide in more than two years — left some residents unsettled Wednesday.

Police have not released the names of the man and woman who were killed Tuesday, or details of how they died. Neighbors said they had recently moved to an apartment with their two small children.

Police said an adult cousin of one of the victims called 911 after finding their bodies.

“I guess this could happen anywhere,” said Damien Macias, 32, who lives in the 4500 block of South 31st Street where the killing happened and described the neighborhood as “safe.”

The door to the victims’ home in a three-story brick apartment building was closed Wednesday with red tape marked “evidence.”

The man and woman were both described by police as 30 years old and Hispanic. Neighbors described them as a quiet family.

Macias was going to a neighborhood pool with his children Wednesday morning. He said he believes his son, who is 7, attended school with the victims’ son.

“I have a buddy who is a psychologist for the school,” Macias said. “I’ll have to find out the best way to let my kids know what happened.”

The last homicide in Arlington happened in March 2010, when Cain Guevara-Estrada, 20, of Arlington, was fatally stabbed in the Lyon Park neighborhood.