AGARTALA, Oct 3: All Tripura Tiger Force (ATTF) militants yesterday released Partha Pratim Majumder, a government doctor after 10 days in captivity.The whereabouts of another kidnapped doctor are not known.Police said today that Majumder, a doctor with the Borakha primary health centre, was kidnapped by ATTF militants on September 21 from Jirania in West District on his way to work. He returned home in Agartala last night, unhurt.An Indian Medical Association delegation had, in a memorandum to Chief Minister Manik Sarkar, issued a seven-day ultimatum for Majumder's release.Meanwhile, Ranjit Reang, son of State Communist Party of India (Marxist) Member of Parliament Bajuban Reang and government doctor Pradip Reang, are in captivity of another outlawed outfit, the National Liberation Front of Tripura, since June 24 and July 17 respectively.The militants allegedly demanded a huge ransom for their release.In another incident at Brahmacherra under the Teliamura police station of West District, a groupof unidentified gunmen swooped down on five non-tribals while they were working in their paddy field yesterday and took away two of them, Subhas Sarkar, nephew of a local Nagar Panchayet Chairman Sudhir Sarkar and Niranjan Sarkar, at gun point. Three others managed to escape, police said.Search operations by the army and paramilitary forces were on, sources said.Meanwhile, security personnel raided the Belbari area under Jirania police station in West District, arrested NLFT militant Kunja Debbarma and recovered a scooter reportedly stolen by the militants.The security team also arrested another NLFT militant from the Manpathar area in South District last night, police added.