Havana, Ramadan 18, 1437, Jun 23, 2016, SPA -- The Colombian government and the Revolutionary Armed Forces of Colombia (FARC) rebel group took a final step toward peace in their decades-long conflict Thursday, signing a definitive cease-fire agreement at a ceremony in Havana, according to AP. Colombian chief negotiator Humberto de la Calle and guerrilla leader Luciano Arango signed the agreement at a ceremony in Havana before Colombian President Juan Manuel Santos and FARC commander Rodrigo "Timochenko" Londono, with UN Secretary-General Ban Ki-Moon and a host of regional leaders from Cuba, Mexico, Venezuela, Chile and El Salvador, in attendance. The cease-fire was years in the making, a final step in peace negotiations launched in 2012. In the agreement, both sides agreed to ban arms in the exercise of politics - a historic step for a country embroiled in civil war since the 1960s. FARC agreed to use non-violent means to work for its political goals, and the government promised to protect the disarmed rebels - in contrast to the 1980s, when thousands of members of the FARC's nascent Patriotic Union political party were slain by right-wing paramilitaries. Negotiators have already agreed on transitional justice programmes, aid to victims of the conflict, joint action against organized crime, agricultural development programmes in rebel territories and political participation for former guerrillas. World leaders have welcomed the signing of the cease-fire agreement. -- SPA 23:26 LOCAL TIME 20:26 GMT www.spa.gov.sa/w