The year 2011 saw over 2,000 incidents of FARC activity, which was the highest figure recorded since 1998. The NGO has stated that while most of these incidents remain defensive in nature and were not like the large offensives from years past, FARC actions grew since 2005, and the rebel group was carrying out intense operations against small and medium-sized Colombian military units in vulnerable areas. Colombian troops killed FARC leader Alfonso Cano in a firefight on 4 November 2011. The 6th Front of the FARC, which was in charge of Cano's security at the time of his death, retaliated by killing two policemen in Suarez and Jambaló some 24 hours after the death of Cano. On 26 November 2011, the FARC killed Police Captain Edgar Yesid Duarte Valero, Police Lieutenant Elkin Hernández Rivas, Army Corporal Libio José Martínez Estrada, and Police Intendant Álvaro Moreno after government troops approached the guerrilla camp where they were held in an area of the Caqueta department. Police Sergeant Luis Alberto Erazo Maya managed to escape his captors and was later rescued. The Colombian military had information indicating that there could be captives in the area and initiated Operation Jupiter in October 2011, using a 56 men Special Forces unit to carry out surveillance for preparing a future rescue mission that would involve additional troops and air support. According to the Colombian military, this same unit remained in the area for 43 days and did not find the captives until they accidentally ran into the FARC camp on the way back, which led to a shootout. Relatives of the captives, former victims and civil society groups blamed both the government and FARC for the outcome, questioning the operation as well as criticizing military rescues. 2012–2015: Peace talks and end of the armed conflict In 2012, FARC announced they would no longer participate in kidnappings for ransom and released the last ten soldiers and police officers they kept as prisoners, but it has kept silent about the status of hundreds of civilians still reported as hostages, and continued kidnapping soldiers and civilians. On 26 February 2012, the FARC announced that they would release their remaining ten political hostages. The hostages were released on 2 April 2012. The president of Colombia, Juan Manuel Santos, said that this incident was "not enough", and asked the FARC to release the civilian hostages they possess. On 22 November 2012,