IMPHAL, Jul 31 : While condemning the mysterious death of Ningthoujam Babysana of Thangmeiband Meisnam Leikai at the boarding of Standard Robarth Higher Secondary School on July 18, Zeliangrong Union (Assam, Manipur and Nagaland) appealed all the groups concerned to call of the ban imposed on the said school in the interest of the students in particular and the guardians in general. A press release issued by ZU (AMN) also denounced the State Government for its failure to solve the case even though it has been almost two weeks since the student was found hanging under mysterious circumstances inside the boarding. The union then urged the authorities concerned to expedite the investigation and reward befitting punishment to the culprit/s involved at the earliest.