TITUSVILLE, Fla. -- Titusville resident William Herring acted in self-defense when he grabbed a gun and shot two intruders who attacked him in his garage early Sunday morning, killing one of them, police investigators said.

It's the third fatal shooting in Titusville in three weeks, but unlike the other two, police are not looking at it as a criminal offense, Local 6 News partner Florida Today reported. Herring, 46, has not been charged.

Herring was working in his garage at 908 S. Washington Ave. in downtown Titusville when he spotted two men on his property "in an area they didn't belong," Assistant Police Chief John Lau said. The two men attacked Herring with a pipe and tire iron, and he grabbed a handgun that he kept in the garage and shot at them three times, Lau said.

Herring then called 911 to report the shooting, officials said. When officers arrived at 12:30 a.m., they found 44-year-old William Wade Hose, of Mims, dead.

Christopher J. Zagorski, 47, also of Mims, was taken to Holmes Regional Medical Center in Melbourne with serious injuries. He was listed in critical condition on Sunday.

"Both shooting victims knew the (resident), and there appears to have been some type of feud between them," Lt. Todd Hutchinson said in a release.

Investigators were still trying to determine the nature of their relationship, Lau said.

"We've had nothing in the past to make us think that this would happen," Lau said.

A pipe and tire iron were found at the scene, according to officials. Herring had wounds consistent with being hit with a blunt object, investigators said.

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