SEATTLE -- Sheriff's deputies are investigating the shooting death of a man in Boulevard Park early Tuesday morning.

Deputies answering a 911 call about gunshots at an apartment complex found a shooting victim in a car at 12:30 a.m.

The 25-year-old man had been shot at least once. He was pronounced dead at the scene, deputies said.

Investigators said they aren't sure what led to the shooting.

"We're just looking at all issues, whether it's related to domestic violence or a stranger. We're still not sure at this point. We're still in the midst of the investigation," said D.B. Gates of the King County Sheriff's Department.

No weapon was found.

Detectives said they believe the man did not live at the complex.