The United States on Monday condemned "unjustified use of deadly force" in the latest Hong Kong violence and urged police and civilians alike to de-escalate the situation, a senior Trump administration official said.

In a separate statement, U.S. State Department spokeswoman Morgan Ortagus urged Beijing to honor commitments that "Hong Kong will 'enjoy a high degree of autonomy' and that the people of Hong Kong will enjoy human rights the freedoms of expression and peaceful assembly."

The U.S. statements came as Hong Kong riot police fired tear gas at a university campus on Tuesday, a day after a protester was shot and a man set on fire in some of worst violence to rock the Chinese-ruled city in more than five months of anti-government demonstrations.