A day after increasingly tense clashes between police and protestors in Hong Kong, the U.S. State Department called on both sides to “exercise restraint” and seek “dialogue.”

“‎We condemn violence on all sides, extend our sympathies to victims of violence regardless of their political inclinations, and call for all parties— police and protestors— to exercise restraint,” said State Department spokesperson Morgan Ortagus in a statement issued late Monday.

“The increased polarization within Hong Kong society underscores the need for a broad-based and sincere dialogue between the government, protestors, and citizenry writ large. The United States urges the Hong Kong government to build on its dialogue with the Hong Kong public and begin efforts to address the underlying concerns driving the protests. We also urge the protestors to respond to efforts at dialogue,” Ortagus added.

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The statement comes as Reuters reports that riot police fired tear gas at a university campus on Tuesday and protestors blocked streets and subway stations to disrupt commuter railway services.

As NPR’s Bill Chappell reported, Monday “was perhaps the most violent day in roughly five months of protests over Hong Kong’s relationship with Beijing.”

On Monday, a Hong police officer shot an unarmed protestor at point-blank range as he held another protestor in a head lock. Hong Kong police said the officer acted in self-defense.

Another man was set on fire after an angry exchange with protestors in a different part of the city. The incident caused Hong Kong Chief Executive Carrie Lam to label the protestors as “the people’s enemy” who were “destroying society.” She said that about 60 people were injured in Monday’s violence.

Lam said she would “spare no effort” to bring the protests to an end.

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