DIG of Bihar's Tirhut range R K Singh, who was camping in Gorakhpur to oversee the operations carried out for rescuing the NHPC abductee, said the kidnappers had dropped Mandal near Kushinagar station yesterday and allowed him to board the train coming from Muzaffarpur to travel to New Delhi.
Singh expressed unawareness about any ransom paid by the his relatives for his release which he claimed was made possible because of the sustained efforts by the Special Task Force (STF) of Bihar and Uttar Pradesh police.
K K Singh, Chief Engineer of NHPC, had earlier escaped unharmed on November 26 from the clutches of his kidnappers.
Singh and Mandal were kidnapped by a gang of suspected extortionists on November 19 from a place in Vaishali district, when they were travelling to Bettiah to attend a meeting.
The kidnappers had called up the residences of Singh and Mandal in Delhi demanding Rs Five crore each from their families for their release.
The hideouts of several anti-socials, including the premises of two controversial Lok Janshakti Party (LJP) MLAs had been raided several times in the past few days in connection with the kidnapping.