On Sunday, US President Donald Trump issued a warning to anyone who even attempts to “harm” federal monuments, including the Lincoln or Jefferson Memorials, saying that they will automatically face a substantial prison term.

Historic monuments and statues have become the targets of anger and vandalism during protests in the wake of George Floyd‘s death while in police custody at the end of May. The initial statues under fire were those of Confederate soldiers and generals largely in the South, but the anger has spread to monuments well beyond that historical period.

“No, Radical Left anarchists, agitators, looters or protesters will not be knocking down or harming the Washington Monument, the Lincoln or Jefferson Memorials,” Trump tweeted. “If they even try, an automatic 10 years in prison. Sorry!” Trump’s warning included “just about any other” federal statues or monuments as well.