PARKER, Yakima County — The FBI is investigating a triple homicide in the Yakima Valley town of Parker.

The Yakima Herald-Republic said sheriff’s deputies were called to a house in Parker shortly after 6:20 p.m. Monday.

Sheriff’s spokesman Casey Schilperoort said three people were fatally shot, and the suspected shooter has been taken into custody.

Federal investigators are taking the lead in the case because the suspect is a tribal citizen.

Yakima County Coroner Jim Curtice said the victims were two men and a woman, and autopsies are being scheduled. Curtice is waiting to complete notification of the victims’ relatives before releasing names.

Their deaths bring the total number of homicides in Yakima County this year to 20.