Colombia’s government on Saturday announced a roughly $700,000 reward for information leading to the arrest and conviction of four leaders of a rebel group, whose turf war with guerrilla dissidents in a coca-growing region bordering Venezuela has left dozens of people dead.

Colombian President Gustavo Petro suspended peace talks with the leftist National Liberation Army (ELN) on Friday, after accusing the group of committing a war crime in the Catatumbo region, in the country's Norte de Santander province.

Colombian President Gustavo Petro said Monday he will declare a state of emergency after guerilla attacks by the ELN in the northeast of the country killed at least 80 people and forced over 11,000 to flee.