One of the two abducted National Hydroelectric Power Corporation engineers in Bihar was freed in Gorakhpur district in Uttar Pradesh on Friday, sources said in Patna.

A special task force of the UP police freed Chief Engineer K K Singh following a raid in Gorakhpur at around 1630 IST, Bihar Director General of Police Narayan Mishra said.

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There was no word on the fate of the other abductee, NHPC General Manager (Projects) T Mandal, Mishra added.

Singh and Mandal were abducted on November 19 from a place in Vaishali district, when they were travelling to Bettiah to attend a meeting.

The abductors had on Tuesday called up the residences of Singh and Mandal in Delhi demanding Rs 5 crore each as ransom.

The hideouts of several criminals, including those of two controversial Lok Janshakti Party legislators, Rajan Tiwari and Vijay Kumar Shukla alias Munna Shukla, had been raided several times in the past few days in connection with the case.