A six-hour 'Rail Roko' protest by Samyukt Kisan Morcha (SKM) over the violence in Uttar Pradesh's Lakhimpur Kheri affected 130 locations and the running of 50 trains in the Northern Railway zone on Monday, its chief public relation officer said. SKM demanded the dismissal and arrest of Union Minister Ajay Mishra. His son Ashish Mishra was arrested in the case.