Oreshnik ‘Hazel tree’, is a Russian intermediate-range ballistic missile (IRBM) characterized by its reported speed exceeding Mach 10 (12,300 km/h; 7,610 mph; 3.40 km/s). The missile is equipped with six warheads, containing 6 submunitions, and is described as highly difficult to intercept. Deputy Pentagon Press Secretary has identified the Oreshnik as a variant of the RS-26 Rubezh IRBM.