The incident was reported around three days ago when the accused, identified as a vagabond often seen around Sector 6, allegedly lured the boy and took him to the hospital premises, where he allegedly sodomised him and fled the spot, said a police official.
The incident took place in a secluded ward on the fourth floor of the hospital building. A case has been registered under Section 377 of IPC and relevant sections of POCSO Act, said police.
The victim, whose father sells food articles outside the hospital, often accompanied his father and played around the hospital premises, police added.