Retaliation by central forces came after moving towards Tekalgudem village, core area of wanted Naxal commander Madvi Hidma, elusive leader of PLGA. Hidma, most-wanted Maoist, carries reward of Rs 7 lakh, named in NIA charge sheet for attacks on security forces. Hidma provides money to OGWs for procuring material fraudulently. Security agencies investigating intelligence failure ahead of new FOB opening. Over 150 FOBs set up by CRPF and BSF in past 5 years, shrinking Naxal area.