Police are to question a four-year-old boy who has left hospital two days after suffering a fractured skull when he was battered with a brick.
A path leads from the boy's house to the scene of the attack in Hessle
An 11-year-old boy arrested on Saturday on suspicion of assaulting Charlie Davis near his home in Hessle, East Yorkshire, has been released on bail.
Charlie, who had surgery on a damaged ear, was released from Hull Royal Infirmary on Saturday evening.
Police said the boy was now recovering at home with his parents.
Until now he has not been well enough to tell police how the attack came about.
A Humberside Police spokeswoman said: "Today, officers will be speaking to him and taking a full statement from him regarding the incident and the full circumstances surrounding it."
She said there was no evidence yet to back up reports that he had been dragged 200 yards by his attacker and then tied to a tree.
"It is currently unclear how the child got to the area," she said.
"He may have gone of his own accord, he might have been chased there or he may have been taken by someone against his will.
"At this stage police do not know what happened and are keeping an open mind."
The youngster was assaulted on a strip of land between the Hull-to-Hessle railway line and Station Road, Hessle, 200 metres from his home in Danes Road.
The incident happened shortly before midday on Thursday after Charlie had gone out to play with a friend.
Police described the attack as "particularly nasty" and said the victim had suffered "horrible injuries".
He suffered a slight fracture to the base of his skull, and underwent reconstructive surgery on his ear to repair cartilage damage.