In a statement issued here today, the EC said the voting would be held in Roberstganj and Duddhi falling in Sonbhadra district and Chakia in Chanduali district from 7 am to 4 pm.
Both Sonbhadra and Chandauli fall in Naxal-affected areas of the state, where the final phase of the polling is slated for March 8.
In the rest of assembly constituencies, undergoing polling on March 8, the voting will take place from 7 am to 5 pm.