Even as the economic blockade on both the highways leading to Manipur continues, there seems to be a spill-over effect in other landlocked regions of northeast India - both Tripura and Mizoram are witnessing scarcity of fuel for a week after the centre asked Indian Oil Corporation to shift the route of sending fuel tankers to Imphal on priority, leaving the main fuel loading terminal in Guwahati to delay its load for other northeastern states.