Colombia will decide within months from which NATO country it will purchase fighter jets, new Defense Minister Pedro Sanchez said, acknowledging that illegal armed groups have taken advantage of peace efforts to strengthen themselves militarily.

Colombia has been looking to replace its fleet of more than 30-year-old Israeli Kfir planes for more than a decade and is considering U.S.-made F-16s, Sweden’s Gripen and France’s Rafale, Sanchez said in a Sunday interview.

He would not say how much Colombia will spend on the planes or how many it will buy, but the government said in 2023 it had a $3.65 billion budget to purchase some 16 planes.