Alternatively, this may have been part of a pre-arranged plan to support the claims of his father Ulugh Beg, who was by this point Shah Rukh's last surviving son.[7] Ala al-Dawla, who had been biding his time in Herat, declared himself sultan upon learning of the situation, and distributed his grandfather's treasury among the troops.[8] The prince's soldiers then launched an attack against his renegade cousin, freeing the dowager empress and rescuing his grandfather's body, which he had buried in the Gawhar Shad Mausoleum in Herat.[7][note 1]