FILE PHOTO - U.S. Sen. Marco Rubio (R-FL) asks a question of U.S. Secretary of State Mike Pompeo during Pompeo's appearance before a Senate Foreign Relations Committee hearing titled "An Update on American Diplomacy to Advance Our National Security Strategy" on Capitol Hill in Washington, U.S., July 25, 2018. REUTERS/Lucas Jackson

WASHINGTON (Reuters) - The Republican leaders of a U.S. congressional commission on China urged President Donald Trump’s administration on Wednesday to broaden sanctions on Chinese officials over its treatment of minority Muslims in the Xinjiang region.

In a letter on Wednesday, Senator Marco Rubio, chairman of the Congressional-Executive Commission on China, and Representative Chris Smith, the co-chairman, asked Secretary of Commerce Wilbur Ross to expand the list of Chinese entities barred from purchasing equipment that could be used for surveillance.

“Given the national integration of China’s state security apparatus, we believe there should ... be a presumption of denial for any sale of technology or equipment that would make a direct and significant contribution to the police surveillance and detection system (in the Xinjiang Uighur Autonomous Region),” Rubio and Smith said.

The U.S. State Department on Tuesday expressed deep concern over China’s “worsening crackdown” on minority Muslims in the Xinjiang region, as the Trump administration considered sanctions against Chinese senior officials and companies linked to allegations of human rights abuses.

Discussions have gained momentum within the U.S. government over possible economic penalties in response to reports of mass detentions of ethnic Uighurs and other Muslims, which has prompted a growing international outcry.