President Trump promised an “orderly transition” on Jan. 20 after Congress early Thursday certified the Electoral College vote that gave Democrat Joe Biden his presidential victory.

The certification came after a day in Washington, D.C., that was marred by pro-Trump protesters storming the U.S. Capitol.

Dan Scavino, the White House deputy chief of staff, posted a statement from Trump on Twitter that called for calm in the early hours of Thursday morning.

“Even though I totally disagree with the outcome of the election, and the facts bear me out, nevertheless there will be an orderly transition on January 20th,” the statement read. “I have always said we would continue our fight to ensure that only legal votes were counted. While this represents the end of the greatest first term in presidential history, it’s only the beginning of our fight to Make America Great Again!”

Trump had encouraged his supporters to march on the Capitol to protest lawmakers’ actions, and later appeared to excuse the violent occupation by the mob, which forced its way inside and clashed with police.

Members of Congress were forced into hiding, offices were ransacked, and the formal congressional tally halted for more than six hours.

Authorities said four people died during the violence, including one woman who was shot by an officer outside the House chamber.

Detractors of the president criticized him for stoking anger among his supporters and said a violent incident was inevitable. They said the president has been pushing the false narrative about election interference for the past month and his presidency was bound to end in chaos.

Facebook CEO Mark Zuckerberg on Thursday said that President Trump’s Facebook and Instagram accounts will be blocked “indefinitely,” and for at least the next two weeks before Inauguration Day.

The FBI is asking for help identifying individuals who may have been involved in violent conduct or rioting. Anyone with information is asked to call 1-800-CALL-FBI or visit http://fbi.gov/USCapitol.