WASHINGTON — The interim chief of the Capitol Police apologized Tuesday for failing to prepare for what became a violent insurrection despite having warnings that white supremacists and far-right groups would target Congress.

Yogananda Pittman, in prepared testimony before Congress, said that the Capitol Police “failed to meet its own high standards as well as yours.” She listed several missteps: not having enough manpower or supplies on hand, not following through with a lockdown order she issued during the siege and not having a sufficient communications plan for a crisis.

“We knew that militia groups and white supremacists organizations would be attending,” Pittman wrote. “We also knew that some of these participants were intending to bring firearms and other weapons to the event. We knew that there was a strong potential for violence and that Congress was the target.”

Her admissions come as U.S. law enforcement investigate a number of threats aimed at members of Congress and as the second impeachment trial of former President Donald Trump gets underway.

Trump supporters tore down fences and broke through doors and windows after an event in which the now-former president called on them to “fight” and “stop the steal.” Inside the building, Congress was certifying the victory of President Joe Biden. Five people died in the insurrection.