GUWAHATI, March 21: GRP personnel arrested two persons – Papu Singh (41) and Ranjit Kumar Srivastav (34), both hailing from Bihar – from Down Rajdhai Express in Guwahati Railway Station this morning and seized 60 kg marijuwa (ganja) from them. The duo was taking the material to Bihar from Dimapur. Papu Singh is a teacher by profession.