The Election Commission of India on Thursday sought a detailed report from the administration in connection with an incident of violence in Boyal area in Nandigram where Trinamool Congress chief Mamata Banerjee paid a visit to oversee the polling process. The West Bengal chief minister visited several booths across the high-profile Nandigram constituency, where she is pitted against her former lieutenant Suvendu Adhikari of the BJP. As soon as Banerjee reached Boyal, BJP supporters started chanting 'Jai Shri Ram' slogans. Supporters of the two parties then indulged in violence, as TMC leaders demanded re-polling in booth number 7, police said. Central forces tried to restore law and peace in the area.