Election Commission today announced a by-poll for one seat of Rajya Sabha from Uttar Pradesh. Notification for the poll will be issued on Tuesday and nominations can be filed till 1st of September. Polling will be held on 11th of September.  <br />''<br />''The seat is lying vacant due to the death of independent member Amar Singh who passed away on 1st of this month. <br />''<br />''<br />''<br />''<br />''<br />''<br />''<br />