On 6 August 2012, the Russian Federal Space Agency lost a Russian and an Indonesian communications satellite in an attempt to launch them into orbit on a Proton-M due to technical difficulties with the last stage. On 2 July 2013, a Proton-M launching three GLONASS navigation satellites experienced a failure reminiscent of the 1960s disasters shortly after liftoff when the booster crashed near LC-39 at Baikonour, ending a 30-year unbroken stretch without a first stage failure; all future Proton flights were suspended pending investigation. The accident was eventually determined to be caused by the rate gyro package having been installed upside-down. Due to the difficulty of installing the package incorrectly, it was widely suspected that it had been done deliberately by a disgruntled or drunk worker at the Khrunichev plant.