Drones struck an army base in Santa Rosa del Sur over the weekend. Reports put the toll at three to four soldiers dead and 16 to 44 wounded. The New York Times, citing officials, blames the ELN, and President de la Espriella vows the attackers will have "nowhere to hide".
Colombia's state has fought the ELN (National Liberation Army), the country's largest remaining guerrilla group, since the 1960s. Attempts at peace talks have repeatedly stalled, and the group has increasingly used drones against soldiers and police in recent years.
Drones hit a military base in Santa Rosa del Sur over the weekend; Al Jazeera reports three soldiers killed and 16 wounded, Telesur four dead and 44 wounded. The New York Times, citing officials, says the ELN carried out the attack, while President de la Espriella said those responsible will have "nowhere to hide".