We are following with concern acts of violence that started in Colombia's Catatumbo region, and spread to various parts of country,' says Foreign Ministry - Anadolu Ajansı

Colombia vowed "war" against left-wing guerrillas Monday, declaring a state of emergency and deploying thousands of soldiers to contain violence that killed at least 100 people and threatens to scupper the country's fragile peace process.

The ELN, which has an estimated 6,000 fighters, reportedly attacked civilians it accused of collaborating with a rival group, the FARC-EMC, shooting them in the streets, while in rural areas firefights broke out between members of both groups.

Colombia vowed "war" against left-wing guerrillas Monday, declaring a state of emergency and deploying thousands of soldiers to contain a wave of violence.

Clashes between armed groups in Colombia have led to some of the worst violence in the country in years. By Julie Turkewitz Reporting from Bogotá, Colombia At least 80 people are dead and more than 18,

A fresh outbreak of guerrilla violence amid a faltering peace process in Colombia has left more than 80 people dead, including civilians, and displaced around 11,000 in just four days,