The engineer, Senthela P Raju, was brought from the nearby Bhutan Hills where he was held captive by suspected NDFB militants, to Kumarikata by an armed member of the outfit late last night.
The militant left Raju at Kumarikata who,then boarded a bus and arrived at Goghrachowk in Tamulpur area this morning and informed the police about his release.
Raju told the police that he was taken to the Bhutan hills by the captors and was not subjected to any torture.
Raju said that he was not aware of the reason for his kidnapping though he suspects that it could have been for ransom.
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He further said that he was not aware whether the company had paid ransom for his release.
A PGCIL spokesman, however, said that the company did not pay any ransom to the militants.
Raju has been admitted to a hospital for a health check up.
Raju, who hails from Nellore in Andhra Pradesh, was kidnapped on February 15 last from the Power Grid Corporation's camp at Dhekipota under Goreshwar police station near the Indo-Bhutan border.