Lora Young and Jason Lockamy

ROCK HILL, S.C. (AP) — A shooting that killed a Fairmont woman and three others was a murder-suicide, authorities say.

Authorities in Rock Hill, South Carolina, say a man shot and killed his wife, her son and his girlfriend before he turned the gun on himself.

York County Sheriff’s Office spokesman Trent Faris told a brief news conference Tuesday that he couldn’t say what motivated 55-year-old Randy Moore to shoot his wife, 50-year-old Assistant York County Manager Anna Hubbard Moore; her 31-year-old son, Jason Lockamy of Hamlet; and his 31-year-old girlfriend, Lora Kathryn Young of Fairmont.

Faris said investigators are working as quickly as possible to get answers for the families of the victims. He said investigators also are awaiting results from a ballistics test and other forensic tests.

Neighbors said the Moores had just moved to the home where the shootings occurred Sunday.

Faris said a friend found two of the bodies inside the home and two were found outside.