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.

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 car bomb and an attack on a police helicopter in Colombia have killed at least 17 people, including police officers.