The Saturday attack was reportedly carried out by members of the Peruvian communist guerrilla group Shining Path in an area considered to be the organization’s stronghold.
"We are conducting operations to recover our deceased and injured personnel. It is difficult but our staff will get them out of the conflict zone," the Peruvian Army’s Gen. Fernando Acosta said, as quoted by the El Comercio newspaper.
The convoy was heading to guard local voting stations and deliver materials for upcoming presidential elections, according to the media outlet.
On Sunday, Peruvians are set to elect a new president and members of congress.