NEW DELHI, Aug. 18 (Xinhua) -- One security member was killed and three others injured in an improvised explosive device blast allegedly triggered by Naxals in India's central state of Chhattisgarh on Monday, local police said.

The incident occurred in the National Park area of Chhattisgarh's Bijapur district, when a security team belonging to the District Reserve Guard was carrying out an anti-Naxal operation.

The injured were admitted to a local hospital. ■