Robb Robillard, who was staying at the motel when the shooting occurred, said that it was "scary" a three-year-old was the culprit.
"I came out of the room and saw police officers downstairs and I came down the stairs and saw a whole bunch of cop cars," he told KRQE News 13.
"I think everybody should have the right to own guns, but you need a lock on them too, especially when kids are around," he added.
A two-year-old girl was found by police in the room, but she was not injured. The children have been placed in the custody of the Children Youth and Families Department for a minimum of 48 hours.
Local animal control officials were also called to remove two pit bulls that were discovered in the motel room.
Police said that the parents could face charges of criminal negligence for allowing a loaded gun to get into the possession of a child.
The District Attorney's office will be notified and will decide whether to press charges.
The case is strikingly similar to a shooting in December last year, when a woman, 29, was fatally shot by her two-year-old son in an Idaho Walmart, after he found a gun in his mother's handbag.
- Independent