"Like all Americans I am outraged by the violence, lawlessness, and mayhem," Trump said in taped remarks posted on Twitter. "And to those who broke the law, you will pay."
The president went on to acknowledge the congressional certification of President-elect and Democrat Joe Biden's victory in their White House race in 2020.
"Now Congress has certified the results. A new administration will be inaugurated on January 20. My focus now turns to ensuring a smooth, orderly and seamless transition of power," he said. "This moment calls for healing and reconciliation."
A big crowd of Trump's supporters forced their ways into the Capitol on Wednesday afternoon when Congress met to formally count the Electoral College votes and affirms Biden's win.
The chaotic and disruptive situation forced an hours-long lockdown on the Capitol grounds and left four people dead, along with multiple injuries and dozens of arrests.
The US Congress early Thursday morning affirmed Biden's victory, in which the former US vice president won 306 Electoral College votes versus 232 for Trump.
It takes at least 270 electoral votes to win the White House. Biden also won the popular votes by 7 million and more than 4 percentage points.
