ERODE: Farmers affiliated to the Tamizhaga Vivasayeegal Sangam and Kalingarayan Pasana Sabai protested in front of the Tamil Nadu Pollution Control Board office and later locked it. A group of farmers, who entered the complex housing the office, went to the office premises and pulled down the shutter. Officials who were seated inside were caught by surprise. The protesting farmers, including women, said the Board officials have failed to control pollution.