Nine civilians were killed and 12 others were injured during an operation that was launched with faulty intelligence,” members of the armed forces told the agency.
Several soldiers have been suspended and are under investigation, it said, adding that a high-level military delegation had been dispatched to the area to launch an inquiry.
The Oromo Liberation Front is a secessionist group which the government has branded as the terrorist.
The incident took place at a time when outbreaks of violence have continued to plague the country, mostly in Oromiya.
In February, Addis Ababa imposed a six-month, nationwide state of emergency to tamp down unrest in Africa’s second most populous nation. SkyMore