Following is the chronology of major recent Naxal attacks in the country.
July 16, 2008: 21 policemen killed when a police van was blown up in a landmine blast in Malkangiri district of Orissa.
June 29: Maoists attack a boat on Balimela reservoir in Orissa carrying four anti-Naxalite police officials and 60 Greyhound commandos, killing 38 troops.
Oct 8, 2009: 17 policemen killed when Maoists ambushed them at Laheri police station in Gadchiroli district of Maharashtra.
Sep 30: Naxalites set ablaze Gram Panchayat offices at Korchi and Belgaon in Gadchiroli district of Maharashtra.
Sep 26: Naxals kill BJP MP from Balaghat Baliram Kashyap's sons at Pairaguda village in Jagdalpur (Chhattisgarh).
Sep 4: Naxals kill four villagers in a forest in Aaded village in Chhattisgarh's Bijapur district.
Jul 31: A special police officer and another person killed by Naxals in Bijapur district.
July 27: Six persons killed when Naxals trigger a landmine blast at Dantewada district in Chhattisgarh.
July 23: A 40-year-old tribal killed by Naxalites at Ettapalli taluka in Gadchiroli district.
July 18: Naxalites kill a villager in Bastar and in a separate incident torch a vehicle engaged in road construction work in Bijapur district of Chhattisgarh.
June 23: A group of motorcycle-borne armed Naxal rebels open fire on Lakhisarai district court premises in Bihar and free four of their comrades including the self-style Zonal Commander of Ranchi.
June 16: Maoists kill 11 police officers in a landmine attack followed by armed assault. In a separate attack, four policemen were killed and two others seriously injured when Maoists ambush them at Beherakhand in Palamau district.
June 13: Naxals launch two landmine and bomb attacks in a small town close to Bokaro, killing 10 policemen and injuring several others.
June 10: Nine policemen, including CRPF troops and officers, ambushed by Maoists during a routine patrol in Saranda jungles in Jharkhand.
May 22: Maoists kill 16 policemen in the jungles of Gadchiroli district in Maharashtra.
April 22: Maoists hijack a train with at least 300 people on board in Jharkhand and force it to Latehar district before fleeing.
April 13: 10 paramilitary troops killed in eastern Orissa when Maoists attack a bauxite mine in Koraput district.
Feb 15, 2010: 24 personnel of the Eastern Frontier Rifles (EFR) killed as Maoists attack their camp in Silda in West Midnapore district of West Bengal.
April 4, 2010: Maoists triggered a landmine blast killing 11 security personnel of the elite anti-naxal force Special Operations Group (SOG) in Koraput district of Orrisa.