This handout photo obtained on Aug. 8, courtesy of the U.S. Navy shows ships sailing in formation during Rim of the Pacific 2022, on July 28. Twenty-six nations, 38 ships, three submarines, more than 30 unmanned systems, approximately 170 aircraft and 25,000 personnel are participating in the worlds's largest international maritime exercise from June 29 to Aug. 4 in and around the Hawaiian Islands and Southern California. AFP-Yonhap

South Korea, the United States and 19 other countries are conducting a U.S.-hosted exercise in Hawaii with an aim to prevent the proliferation of weapons of mass destruction (WMD), the U.S. State Department has said.

The five-day Fortune Guard 22 kicked off in Honolulu on Monday. It is part of the exercises for the Proliferation Security Initiative (PSI) launched in 2003 to stop or impede transfers of WMDs and related items flowing to and from states and non-state actors of proliferation concern.

The exercise involves WMD counter-proliferation activities, including operational interdiction and seizure, as well as information exchanges on chemical, biological, radiological and nuclear responses, and live exercises on WMD interdiction capabilities, according to the department.

The U.S. initiated Asia-Pacific PSI exercises in 2014. Participating countries have hosted their own exercises, like Eastern Endeavor in South Korea, Pacific Protector in Australia, Maru in New Zealand and Pacific Shield in Japan.

The series of exercises builds "regional WMD counter-proliferation political will and capacity, and signals partners' resolve to take action to conduct counter-proliferation interdiction as part of their long-term commitment to the PSI," the department said. (Yonhap)