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

CALI, Colombia (AFP)-Colombia on Friday promised to counter the threat from "desperate" armed groups after twin guerrilla attacks killed 19 people and deepened the country's worst security crisis in decades.

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,

Colombia is reeling from two attacks on its police and military, in what's been described as the country's bloodiest day in months.