Black Lives Matter protesters converged upon St. Louis Mayor Lyda Krewson’s house, hurling rocks and breaking windows on Friday night.

Law enforcement officers dispersed the crowd with pepper spray and tear gas after declaring the gathering an “unlawful assembly,” and made at least one arrest. Police in riot gear then deployed tear gas to force protesters away from the scene of the vandalism.

However, the violence continued. Three police officer were struck with bricks and seriously injured.

Earlier in the day, protesters also attacked police with rocks and other projectiles.

Police reported that 13 people were arrested and four officers suffered minor injuries as a result of the earlier protest.

Later at night, demonstrators burned American flags.

Protesters burn the American flag during their protest on the not guilty verdict of Jason Stockley.(Warning: Graphic language) Posted by KMOV on Friday, September 15, 2017

Protesters also harassed and threw water bottles at a local television reporter. (RELATED: ST. LOUIS: Protesters Surround Reporter, Throw Bottles At Him [VIDEO])

The protest comes after Jason Stockley, a white police officer, was found not guilty of murder for shooting Anthony Lamar Smith, a black male.

Protests are expected to continue into the weekend.