Chandigarh/Ambala, Farmers under the banner of the Samyukta Kisan Morcha (non-political) and Kisan Mazdoor Morcha on Wednesday squatted on a rail track in Patiala district near the Punjab and Haryana border, demanding the release of three farmers who had been arrested by the Haryana Police. The movement of more than 30 trains was impacted as they were either diverted, cancelled or short-terminated because of the blockade at the Shambhu Railway Station, railway authorities said.