( CNN ) -- The Colombian military lost 13 members Saturday to an attack by FARC rebels , the country 's army said in a statement . Two sergeants and 11 soldiers were killed . Another soldier was injured in the `` terrorist '' attack and is receiving medical treatment , the military said . This is the second incident in two months , reigniting tensions between the two sides , which have been in peace talks that started late last year . Last month , FARC admitted to capturing U.S. soldier Kevin Scott Sutay after he entered Colombia . Colombian Defense Minister Juan Carlos Pinzon criticized the apparent kidnapping and called for his immediate release . Pinzon said the apparent kidnapping showed the rebel group 's promises have been disingenuous in the past . `` This organization had promised not to kidnap and they kidnapped an ordinary citizen , '' he said . `` It is absurd that they continue abusing with promises that , it seems , continue to be false . '' The leftist FARC , or Revolutionary Armed Forces of Colombia , has been at war with the government since the 1960s , making it the longest-running insurgency in Latin America . There have been sporadic attempts at peace since the 1980s . The last fell apart in 2002 . Then-President Andres Pastrana ceded an area the size of Switzerland to FARC , but ended negotiations after rebels launched a series of attacks across the country in an apparent bid to strengthen their position .
Two sergeants , 11 soldiers among the dead . The attack was carried out by a suicide bomber who blew himself up in front of an army checkpoint on the road to Kabul. FARC still holding American hostage .