In Chhattisgarh, naxalites have killed a policeman in the Dantewada district and kidnapped two others in the Bijapur district today.According to the police sources, the naxalites attacked the policeman this afternoon in a weekly market under the Katekalyan police station area of the Dantewada district and slit his throat to death.In the second incident, naxalites kidnapped two persons including a former SPO from the Gangalur police station area of the Bijapur district. Hunt is on to locate the kidnapped police personnel.