Russian news website Sputnik said that the air defence cooperation between Saudi Arabia and Ukraine has been deteriorated. It has been claimed that last year Saudi Arabia and Ukraine cooperated for Grom-2 air defence missile and that Saudi Arabia invested $40 million for the development process of the missile. Ukrainian press revealed that Yuzhnoye Design Bureau and Pavlograd Chemical Plant had begun work on Grom-2 tactical short range ballistic missile (SRBM) with invenstment from an undisclosed backer.