Two people shot in a vehicle parked outside a Gwinnett County home Sunday afternoon died as a result of murder-suicide, police said.

The man and woman were dead when Gwinnett police arrived at the Wallace Hill Ridge home shortly after 3:20 p.m., according to department spokeswoman Hideshi Valle. Their names were not released, and their relationship was not disclosed.

Investigators remained in the neighborhood off Sweetgum Road late into the evening.

“At this time, this is believed to be a domestic-related incident,” Valle said in a news release. “Witnesses are encouraged to call GCPD investigators or Atlanta Crime Stoppers with any useful information.”

Tipsters can remain anonymous, and be eligible for rewards of up to $2,000, by contacting Crime Stoppers Atlanta at 404-577-8477, texting information to 274637 or visiting the Crime Stoppers website.

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