Some Nationalist reporters suggested that the town had been bombed from the air, but by Republican airplanes. The bombs were said to have been made in the Basque country and the explosions happened because of dynamite stored in the sewers. Another theory by Nationalists was that there were a "few bomb fragments found" in Guernica, but the damage was mainly caused by Basque incendiaries. Franco's regime minimized the bombing for decades. In 1970, newspaper "Arriba" claimed that there had only been twelve deaths during the bombing raid.