The platform sunk to the bottom of the Persian Gulf on Monday night as it was being installed by POGC and its builder, Iranian Marine Industrial Co. (Sadra), which is controlled by Iran's Revolutionary Guards. It took 2.5 years to build. An investigation into the cause of the sinking has been launched. No casualties have been reported in this incident. This sinking of Revolutionary Guard’s made platform took place just few days before unveiling its “stealth fighter bomber.” Iran has called on foreign aid to recover a $40 million natural gas platform after it sunk to the seabed in the Persian Gulf.