In West Bengal, panchayat polls are underway. 31 per cent voter turnout was reported till 1 P.M. AIR Kolkata correspondent says reports of violence are coming in from several places. Four people have been killed in poll-related violence. One critically wounded person has been taken to hospital. <br />''<br />''Polling began amid tight security. Voting is taking place for 621 zilla parishads, over six thousand panchayat samitis, and nearly 31 thousand gram panchayats. Polling started at 7 this morning and will end at 5 PM. Votes will be counted on Thursday.&nbsp;