He was rescued early today from a house in Lahan Municipality-15 of Siraha district, about 242 kms from here, The Himalayan Times reported.
Four suspects -- Ramesh Lama, Jayaram Yadav, Kishun Yadav and Deep Narayan Yadav -- have been arrested.
A joint team raided Lama's house where Yadav was held hostage, Deputy Superintendent of Police (DSP) Hira Bahadur Pandey said.
The accused had demanded money from the boy's father in Bihar for his safe release, the officer was quoted as saying by the report.
The boy will be handed over to his family after investigation, police added.
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