The boy was branded on his cheek and foot two days ago and had difficulty in walking, Ditrict Child Protection Officer Vijaya said today.
Based on information given by a neighbour, the district child protection unit officials visited the boy in his house yesterday and were inquiring into the incident, she said.
After thorough inquiry, necessary action would be initiated against the offender, she added.
House owner Rani had allegedly branded the boy for playing inside her house during odd hours, officials said.
Police said the boy's father filed a complaint today about the incident and they would inquire into it.
Initially, the boy's family did not lodge a police complaint since they were afraid that the owner may ask them to vacate the house.
