This is a petition under Article 32 for.a writ of hebeas corpus filed by detenu Devi Lal Mahto challenging the order of preventive deteniion dated April 20, 1982, made ~Y the District Magistrate, Dhanbad. F ---...,_. · '-, Detenu Devi Lal Mabto was arrested on March 2, 1982, and, • ·} was produced before the Chief Magistrate, Dhanbad, who remanded him to jail custody till March 17, 1982. On March 1982, detenu moved an application for bail which was fixed .for hearing on March G 24, 1982. On March 25, 1982 the bail application was rejected. On April 20, 1982, the District Magistrate, Dhanbad, made the impugned order of detention in exercise of the power conferred by sub's. (2) read with sub-s. (3) of s. 3 of the National Security Act, 1980 ('Act' > for short). The District Magistrate stated in his order that with a view H to preventing the detenu from acting in a manner prejudicial -to the maintenance of public order he be detained. Grounds of detenti?n