Travis Bohannon was shot in the head and was pronounced dead a short time after the shooting, which happened at about 8 p.m. in Midland, about 25 miles southeast of Terre Haute.

Greene County Sheriff Terry Pierce said the boy's father, Ronald Bohannon, was walking the toddler with another child when he heard the shot and saw that Travis had been hit.

Pierce said investigators have no suspects.

"We don't know if it's accidental and this point, or if it was intentional. That's an investigation that's continuing to determine that," he said.

The sheriff said hunters frequent the rural area and that it is possible that a stray bullet killed the boy.

A neighbor of Bohannon told investigators that he has heard gunshots in the middle of the night lately.

"We've called the cops a couple of times and they say, 'Oh it's the country, people can shoot out here if they want to," said neighbor Steven Maddox. "We was walking down the road the night before around the same time. I mean, that could have been us walking down this road."

Detectives used metal detectors to search a wooded area near the shooting scene, but found no shell casings.

Investigators are asking the shooter to come forward.