BOGOTA, Colombia (AP) - Colombia's main rebel group said Sunday it is abandoning the practice of kidnapping and will soon free its last remaining "prisoners of war" - 10 security force members held for as long as 14 years. The leftist Revolutionary Armed Forces of Colombia, or FARC, announced on its website that it would no longer kidnap civilians "for financial ends," marking the first time the group has unequivocally renounced a tool it long used against Colombia's well-heeled. It is not clear whether an order has been given to release ransom-kidnapping victims currently held by the rebels, whose number is not known. Nor is it clear, given the insurgency's decentralized nature, whether the FARC's ruling seven-man secretariat can enforce its order. The FARC did not provide a date for the liberation of the 10 security force members that it says it holds. That is two fewer than the government has said are FARC prisoners. Sunday's announcement could advance prospects for a peace dialogue sought by the rebels. The rebels did not say, however, that they were abandoning hostilities. They have recently stepped up hit-and-run attacks and the military blames them for a bombing and mortar attack on two police posts in the past month that killed 15 people and wounded nearly 100, most of them civilians. He called it "an important and necessary, if insufficient, step in the right direction." Alvaro Uribe, president in 2002-10, called it "deceitful" in a tweet. Analysts expressed skepticism FARC leaders will be able to enforce it. "One would think that in such a fragmented organization it won't happen uniformly at all levels," said Alejo Vargas, a political scientist at Colombia's National University. He recalled that during 1980s peace negotiations the rebels told then-President Belisario Betancur's government that they would stop kidnapping but did not keep their word. The FARC's fronts are widely dispersed and operate with relative autonomy, so there was no indication Sunday's announcement would mean any imminent release of civilians held for ransom. In the 1990s, kidnappings by the FARC or by criminal gangs that sold the abducted to the rebels helped make Colombia the world's kidnapping capital. Rural highways became perilous scenes of "miracle fishing" by laptop-toting rebels who employed chamber of commerce databases at roadblocks to identify the wealthy. Weakened by military pressure, the rebels have since been hard pressed to house and feed hostages. The practice has also bred societal contempt for the FARC. "Kidnapping has been very costly politically," said analyst Arial Avila of the Nuevo Arco Iris think tank. There is also the question of whether the rebel's current leader, Timoleon Jimenez, has the influence over FARC rank-and-file that its founding leader Manuel Marulanda wielded. Marulanda died of natural causes in 2008. The FARC has been releasing captives piecemeal since early in that year, and some have been rescued by the military in operations such as the daring July 2008 ruse that freed group including former presidential candidate Ingrid Betancourt and three U.S. military contractors. As defense minister in 2006-09, Santos oversaw operations that struck major blows to the FARC and led to unprecedented rebel desertions. Colombia's military has since tracked down and killed the rebels' two top leaders including Alfonso Cano, Marulanda's successor. The FARC, which has about 9,000 fighters, said Sunday it was revoking a "law" that its general staff approved in 2000, when Colombia's government ceded a Switzerland-sized swath of the country to the rebels for peace talks that failed two years later. There was no halt in FARC hostilities during those talks and the negotiations collapsed after the rebels' high-profile kidnapping of a lawmaker, Jorge Eduardo Gechem, who was held for six years before being released as a goodwill gesture. The rebels and the government have not provided any figures on how many civilians are currently held, but analysts say FARC revenues from ransom kidnappings now represent only a sliver of income for a group whose main revenue source is the cocaine trade. The director of the citizen group Pais Libre, Olga Lucia Gomez, said it estimates at least 500 Colombians are now being held for ransom, with the FARC and the country's No. 2 rebel band, the National Liberation Army among those holding victims. The December announcement came a month after the FARC executed three police officers and one soldier when soldiers apparently happened upon their jungle camp. The United States and European Union consider it a terrorist organization. In the 1980s, the FARC's kidnappings and extortion led wealthy ranchers and drug lords to create private far-right militias that evolved into criminal gangs known as paramilitaries. Associated Press writers Frank Bajak in Lima, Peru, and Vivian Sequera in Carcas, Venezuela, contributed to this report.