Colombia’s Armed Forces killed a FARC guerrilla who was head of security for rebel chief ‘Alfonso Cano’ in a confrontation in a village 150 miles southwest of Bogota.

In what President Juan Manuel Santos called a “major blow” to the Revolutionary Armed Forces of Colombia (Fuerzas Armadas Revolucionarias de Colombia – FARC), Alirio Rojas Bocanegra, alias “Abuelo,” was killed during a clash with the Colombian Army in the Tolima department.

As security chief, Rojas was responsible for protecting the FARC’s top commander Guillermo Leon Saenz, alias “Alfonso Cano,” and was an explosives expert, according to El Pais.

Rojas’ death comes four months after rumours that Alfonso Cano had been killed in an army operation, also in Tolima.