bulgaria has never developed nuclear weapons, although some treaties with the soviet union guaranteed the deployment of soviet warheads on bulgarian territory in case of a war with nato. its r-400 missiles were nuclear-capable. in the mid-1990s, journalist goran gotev investigated a testimony of an anonymous soviet army captain published in komsomolskaya pravda, who described in detail an alleged soviet-bulgarian nuclear weapons facility which hosted 70 warheads for tactical missiles. the site consisted of "four three-storey apartment blocks, barracks, a cafeteria, a sports field, a social club, a store, and a plaza", and had 130 personnel. the unit was disbanded in 1989, the warheads were quickly shipped to ukraine and all equipment, uniforms and photos that were present at the facility were destroyed. another russian army official later denied the story. however, in the 1980s four bulgarian air force majors received training in the soviet union on releasing nuclear weapons from mig-23bn aircraft.