In Uttar Pradesh, campaigning for the fourth phase of assembly elections will end tomorrow evening.56 constituencies spread over 11 districts will go to poll in this phase. A total of 966 candidates are in fray and polling will be held on Sunday.AIR Lucknow correspondent reports that line of electoral battle will be drawn for last phase of elections this evening when withdrawal of nomination papers ends. 60 constituencies will go for poll in this phase on March 3.Meanwhile, over 57 per cent voters cast their votes in the third phase of polling held yesterday in 56 Assembly constituencies. More than one crore voters exercised their voting rights. Over 62 per cent polling took place in Naxal-affected districts of Chandauli and Mirzapur. Terming the latest poll figure as overwhelming, Chief Electoral Officer of the state Umesh Sinha said that the poll percentage was higher than the 2007 Assembly polls when 42.56 per cent voters had exercised their franchise.