The United States has announced sanctions on two North Korean officials for their roles in developing the country's ballistic missiles. It is the latest step in a campaign to press Pyongyang to give up its nuclear and missile programs. <br/><br/>US Treasury named the officials as Kim Jong Sik and Ri Pyong Chol. It said, Kim was reportedly a key figure in North Korea's efforts to switch its missile program from liquid to solid fuel, while Ri was reported to be a key official involved in the country's intercontinental ballistic missile development. <br/><br/>Treasury Secretary Steven Mnuchin said in a statement that the Treasury is targeting leaders of North Korea's ballistic missile programs as part of its maximum pressure campaign to isolate North Korea and achieve a fully denuclearized Korean Peninsula. <br/><br/>The statement said, the actions follow Friday's UN Security Council Resolution, which imposed strong new sanctions on Pyongyang further shutting down its ability to raise illicit funds.