At least 80 people are dead and more than 18,000 have been forced to flee their homes in Colombia, officials say, amid fierce clashes between two rival armed groups on the border with Venezuela.

Civilians caught in the crossfire as ELN guerillas target former members of a separate rebel group in the bloodiest violence in recent years A fresh outbreak of guerilla violence amid a faltering peace process in Colombia has left more than 80 people dead,

Terrified residents carrying backpacks and belongings on overladen motorcycles, boats, or crammed onto the backs of open trucks, fled the region over the weekend.

At least 39 people have been killed in violence involving leftwing guerrillas near Colombia's restive border with Venezuela, authorities said Friday, prompting the government to suspend high-stakes peace talks with the group.

Colombia vowed "war" against left-wing guerrillas Monday, as security forces rushed to contain a wave of violence that has killed more than 100 people and threatens to derail the country's

Attacks between guerrilla groups have also seen thousands displaced from the country's Catatumbo region.