The Shaheen-II is an intermediate range ballistic missile (IRBM). It uses a two-stage solid propellant motor and is largest and most capable ballistic missile yet built by Pakistan. Shaheen-II was successfully test fired for the first time on March 9, 2004. It is believed that some Shaheen-II IRBMs have been operationally deployed since 2007.Shaheen-II missile can carry both conventional and nuclear, chemical and biological payloads. There are claims that the Shaheen-II missile has an accuracy based on circular error probable (CEP) of 50 m. The missile is said to have a post separation booster to provide terminal course correction.