Sporadic violence in Bengal and complaints to the Election Commission from the BJP and the state's ruling Trinamool Congress marked polling in fourth phase of the national election. The Election Commission said the provisional voting figure is 64 per cent. The highlight of this round was Mumbai, the country's financial capital home to billionaires and celebrities. For the ruling BJP, this round was crucial, with voting beginning in Madhya Pradesh and Rajasthan - heartland states won by the Congress in assembly elections last year. Overall, polling took place on 72 seats across nine states. The seven-phase election ends on May 19 and the results will be declared on May 23.