The headmistress of the school in the district lodged a complaint with the police on Wednesday after noticing that the tribal girl, a student of Class 6, is pregnant, a police officer said.
The 14-year-old girl was then taken for examination to a local hospital here, and was found to be carrying a six-month-old foetus, the officer said.
"In her statement, she accused the boy, who is of the same age as her, of raping her," he said. The boy was produced on Thursday before a member of the District Juvenile Board, who sent him to an observation home in Angul district, around 315 km from here, he added.