Shugaban kasar Colombia, Juan Manuel Santos da na kungiyar 'yan tawayen FARC Rodrigo Londoño da akafi sani da Timochenko, sun sanya hannu kan yarjejeniyar zaman lafiyar da aka sake yi mata bita wadda ake fatan zata kawo karshen rikicin da aka shafe shekara hamsin ana fama dashi a kasar.
