Orissa decimated Manipur by an innings and 52 runs on the last day of their two-day East Zone Women`s cricket match at Ravenshaw College ground in Cuttack today. Tripura humbled Sikkim by an innings and 64 runs, while Jharkhand were held to a draw by Assam in two other league matches of the tournament. Brief scores: Orissa (221/5 declared) beat Manipur (119 and 50). Tripura (165) beat Sikkim (48 and 53). Assam (91 and 72/2) drew with Jharkhand (143/1 declared).