Gopalganj (Bihar), May 16 (ANI): A farmer was on Monday allegedly murdered over some land dispute in Bihar's Gopalganj district, said police. The incident took place when Hawaldaar Miya was watering his field. Superintendent of Police (SP) Ravi Ranjan Kumar said four people, including a woman resident of the same village, were booked in this connection. He further said one person was arrested. He added that further investigation is going on.