New Delhi, Jan. 8 -- The high intensity IED (improvised explosive device) used by Maoists in an attack in Chhattisgarh's Bijapur district on Monday, in which eight police personnel and a civilian driver were killed, was likely planted at least a month before the incident, officials aware of the matter said, adding that Bijapur continues to be a hot spot for Left-wing extremism (LWE), with IEDs planted by the Maoists being recovered frequently....