Drone attack blamed on guerrillas kills at least three soldiers in Colombia
Officials accuse National Liberation Army of launching strike followed by clash inside military compound

TL;DR
- At least three soldiers were killed and four wounded in an attack in north-eastern Colombia.
- The attack involved explosives dropped from drones followed by a clash inside a military compound.
- Local authorities blamed the National Liberation Army (ELN) for the assault.
- The incident occurred late on Friday in the municipality of Ocaña, Norte de Santander department.
- President Abelardo de la Espriella condemned the attack and vowed a strong state response.