This advice came even as the Supreme Court tossed out a bid from Trump supporters to throw out votes in key battleground states on Friday.
Radio host/conspiracy theorist Alex Jones was also pictured at the demonstrations.
Over Friday night and into Saturday morning, DC police confirmed that they had already arrested five people on “unrest-related” charges.
A statement from the department says that police welcome peaceful protesters to the area around the White House, but warned that they would intervene should any violence or destruction break out – on either side.
“There are peaceful demonstrations in the District of Columbia on a daily basis. The same rules apply for all demonstrations in DC and we welcome anyone to our city who wants to come to exercise their First Amendment rights peacefully,” the statement says.
It continued to warn that police will take action against any “persons that destroy property or hurt someone at anytime.”
“MPD rarely has to make an arrest at a demonstration but in the event that we do, know that it will be done safely and respectfully,” the statement continues.
Pictures of the pro-Trump demonstrations show supporters with Trump flags, megaphones, massive “Stop the Steal” signs and even a group of Proud Boys in kilts.
Demonstrators support President Trump as he continues to insist that he only lost the presidential election to Joe Biden because of wide-spread voter fraud.
Despite Trump’s repeated claims, his legal team has yet to provide concrete evidence of any widespread fraud.