Police in Washington, D.C., are looking for a suspect they say attacked a police officer on Saturday.

The Metropolitan Police Department said in a statement that the incident occurred in the 1600 block of K Street, Northwest. The suspect was reportedly fighting another individual when an on-duty officer intervened.

Police alleged the unidentified suspect struck the officer with an unknown object. The officer was subsequently hospitalized for serious but non-life-threatening injuries.

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Law Enforcement Today noted that at the time of Saturday’s altercation, Proud Boys held a pro-Trump rally in the capital that turned violent. Reports indicated that four people were stabbed and at least 23 people were arrested.

A $10,000 reward is being offered for information in this case.

Anyone with information regarding Saturday’s incident should call the Metropolitan Police Department at 202-727-9099.

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[Featured image: Metropolitan Police Department]