Two separate attacks blamed on dissident guerilla groups killed 18 people and wounded dozens in Colombia, one involving a truck bomb while a drone downed a police helicopter in the other, deepening the country's most serious security crisis in decades.

President Gustavo Petro blames FARC dissidents for a cylinder bomb attack at the air base in the Colombian city. Twelve police officers were killed another attack in Antioquia

A major tragedy has struck South America, where a powerful truck bomb exploded at an air base in Cali, Colombia. The attack, which occurred amid ongoing bomb blasts and political assassinations in the country,