The Farc had accused the Colombian government of making the releases difficult by conducting military operations in the area. President Santos said the talks would resume once all the captives had been set free. But a top Farc commander, Timoleon Jimenez or "Timochenko", said it might not be that easy, since new rules for the talks might be necessary. The government agreed to conduct negotiations without agreeing to a ceasefire, but the Farc insists a bilateral truce is more necessary than ever.Peace talks began two years ago, aimed at ending a conflict that began with the Farc's founded in 1964.More than 200,000 people have died and millions have fled the violence.