Faced with farmers standing firm in calls for action against those who ordered the August 28 lathi charge, and against IAS officer Ayush Sinha for his "crack their (farmers') heads" remark, Haryana Home Minister Anil Vij today said the state will investigate "the entire Karnal episode". Mr Vij also cautioned the farmers, who have launched a sit-in protest outside the mini-secretariat at Karnal, saying that action will be taken against them if the probe finds them guilty.