At least 15 security personnel and one civilian were killed in a Maoist attack on a CRPF search party in Chhattisgarh on Tuesday. The attack on the Central Reserve Police Force (CRPF) troopers took place in the thickly forested Tongapal area in Sukma district, about 500 km south of Raipur in Bastar region.
The area where the attack took place is a largely cut off and Maoists are ruling the roost there since late 1980s.
Here is a timeline of major Maoist attacks since 2009:
April 22, 2009: Maoists hijack a train with at least 300 people on board in Jharkhand and force it to run to Latehar district before fleeing.
October 27, 2009: Maoists detain the Bhubaneswar-New Delhi Rajdhani Express for eight hours during a bandh called by the People's Committee Against Police Atrocities in West Bengal.
November, 2009: Maoists blow up railway tracks in Simdega district in Jharkhand derailing a passenger train, killing two people and injuring 38 people.
May 19, 2010: Maoists trigger landmine blast on railway tracks near Jhargram in West Bengal's West Midnapore district injuring two drivers of a goods train and leaving the engine damaged.
May 20, 2010: Fourteen oil tankers of a goods train derail and catch fire after the Maoists blow up railway lines between Dighwara and Pipra stations in Bihar under Muzaffarpur-Narkatiyaganj section of the East Central Railway.
May 22, 2010: Two people, including a policeman, travelling in the Tatanagar-bound Steel Express, injured in the crossfire between the Maoists and joint forces in West Midnapore district.
May 28, 2010: Maoists derail the Jnaneswari Express in the West Midnapore district of West Bengal, causing its collision with another train, resulting in the death of at least 141 passengers.
June 13, 2013: Maoists attack a passenger train in Bihar's Jamui district Thursday afternoon, killing a railway police personnel and two passengers.
February 9, 2014: Two CRPF officials killed, 12 injured in Naxal attack in Chhattisgarh
February, 28 2014: 7 police personnel killed in Maoist attack in Chhattisgarh.