BOGOTA, Colombia -- Colombia's peace talks are resuming in Cuba amid acrimony over the rebels' insistence on their right to take security force members prisoner.

Chief government negotiator Humberto De la Calle scolded the insurgents Wednesday as he departed Bogota for Havana after a one-week break.

De la Calle said the rebels needed to take responsibility for "their victims" in a clear reference to last week's capture of two police officers. He said there would otherwise be no possibility of an accord.

The Revolutionary Armed Forces of Colombia, or FARC, vowed to halt ransom kidnappings nearly a year ago.

But it said Tuesday it reserves the right to take security force members prisoner.

A two-month rebel unilateral cease-fire expired on Jan. 20. The rebels had hoped the government would join but it refused.

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  • Colombia's government team for the peace talks with Colombia's Revolutionary Armed Forces (FARC) pose for a photo before embarking on an Colombian Air Force plane to Oslo at the military airport in Bogota, Colombia, Tuesday, Oct. 16, 2012. (AP Photo/William Fernando Martinez)

  • Peace Commission Delegation Chief Humberto de la Calle Rangel, center, speaks as he is flanked by Sergio Jaramillo, left, and Frank Pearl, members of Colombia's government negotiating team, at military airport before embarking to Oslo, Norway for peace talks with Colombia's Revolutionary Armed Forces (FARC), in Bogota, Colombia, Tuesday, Oct. 16, 2012. (AP Photo/William Fernando Martinez)

  • FARC rebel Ivan Marques attends a news conference at the Hurdalsjoen Hotel, Hurdal, near Oslo in Norway Thursday Oct. 18, 2012. (AP Photo/Scanpix Norway, Audun Braastad)

  • FARC rebel Jesus Santrich attends a news conference at the Hurdalsjoen Hotel, Hurdal, near Oslo, Norway, Thursday, Oct. 18, 2012. (AP Photo/Scanpix Norway, Audun Braastad)

  • Carlos de Cossio and Humberto de la Calle, right, shake hands during a press conference at the Hurdalsjoen Hotel, Hurdal, near Oslo in Norway Thursday Oct. 18, 2012. (AP Photo/Audun Braastad/NTB scanpix)

  • Helena Ambrosio attends during a news conference at the Hurdalsjoen Hotel, Hurdal, near Oslo, Norway, Thursday Oct. 18, 2012. (AP Photo/Scanpix Norway, Audun Braastad)

  • Helena Ambrosio, background, attends during a news conference at the Hurdalsjoen Hotel, Hurdal, near Oslo, Norway, Thursday Oct. 18, 2012. (AP Photo/Scanpix Norway, Audun Braastad)