US President Donald Trump has warned that protesters who defaced the exterior of St. John’s Church close to the White House could face up to 10 years in prison.

A group of several hundred protesters tried to occupy Lafayette Park across the street from the White House earlier tonight, to create what some called a “Black House Autonomous Zone,” similar to the “Capital Hill Autonomous Zone” in Seattle.

“BHAZ” was spray-painted across the front of St. John’s Church. Protesters also tried to remove the statue of former President Andrew Jackson in the park.

In a late night tweet, President Trump described the protesters’ actions as “disgraceful vandalism.”

“Numerous people arrested in D.C. for the disgraceful vandalism, in Lafayette Park, of the magnificent Statue of Andrew Jackson, in addition to the exterior defacing of St. John’s Church across the street. 10 years in prison under the Veteran’s Memorial Preservation Act. Beware!” he said.

Twitter users tells Trump who Andrew Jackson was. Here are some screenshots of the tweets:

Andrew Jackson

Andrew Jackson was an American soldier and statesman who served as the seventh president of the United States from 1829 to 1837.

Before being elected to the presidency, Jackson gained fame as a general in the United States Army and served in both houses of the U.S. Congress

Known as strong-willed, argumentative and combative in his day, Jackson’s known for his harsh treatment, enslaved workers and his forced removal of Native Americans from their ancestral lands.