US sanctions 6 Beijing, Hong Kong authorities for 'undermining' the island region's autonomy

Those sanctioned include Sonny Chi Kwong Au - the Secretary-General for the Committee for Safeguarding National Security in Hong Kong - and Raymond Chak Yee Siu, the Police Commissioner of Hong Kong Police Force. The other four sanctioned were identified as Dong Jingwei, Dick Chung Chun Wong, Margaret Wing Lan Chiu and Paul Ting Kwok Lam. 

"Beijing and Hong Kong officials have used Hong Kong national security laws extraterritorially to intimidate, silence, and harass 19 pro-democracy activists who were forced to flee overseas, including a U.S. citizen and four other U.S. residents," the State Department said. 

"As a result of today's sanctions-related actions, and in accordance with E.O. 13936, all property and interests in property of the sanctioned persons described above that are in the United States or in possession or control of U.S. persons are blocked and must be reported to the Department of Treasury's Office of Foreign Assets Control (OFAC)," the State Department said. 

"Additionally, all individuals or entities that have ownership, either directly or indirectly, 50 percent or more by one or more blocked persons are also blocked," it continued. 

"All transactions by U.S. persons or within (or transiting) the United States that involve any property or interests in property of designated or otherwise blocked persons are prohibited unless authorized by a general or specific license issued by OFAC or exempt from U.S. sanctions," according to the State Department. "These prohibitions include the making of any contribution or provision of funds, goods, or services by, to, or for the benefit of any blocked person and the receipt of any contribution or provision of funds, goods, or services from any such person." 

Fox News' Nick Kalman contributed to this report.