Police in Cleveland say they have no evidence suggesting three dogs were tied up on a railroad track or two of them were killed by a train, as they initially believed.

Investigators now say they're unsure whether it happened it all.

Working on third hand news, police in Cleveland say an animal control officer told cops about the dogs after he spoke with a railroad worker who said he witnessed a dog being tied to the tracks. The worker also said someone appeared to take photographs or a video.

Today a police commander said all they know now is one dog narrowly missed being hit by a train. But it's unclear if the dog had been tied to the tracks.

Reports of the dog deaths last week outraged animal welfare groups.