IMPHAL, Mar 16: The Council of Higher Secondary Education Manipur has notified in a statement that a total of 13 students have been expelled for using unfair means during the examination today at Kanglatongbi private centre, Kangpokpi private centre, Keithelmanbi private centre, Mayang Imphal private centre, Ramlal Paul Hr Sec School (council centre) and Tadubi private centre. They are debarred from appearing the rest of the said examination, it added.