WASHINGTON — Worried about continuing threats, the acting chief of the U.S. Capitol Police appealed to congressional leaders Thursday to use their influence to keep National Guard troops at the Capitol, two months after the law enforcement breakdowns of the deadly Jan. 6 insurrection.

Yogananda Pittman told the leaders, in a letter obtained by The Associated Press, that the board that oversees her department has so far declined to extend an emergency declaration required by the Pentagon to keep Guardsmen who have assisted Capitol officers since the riot.

Pittman said she needed the leaders’ assistance with the three-member Capitol Police Board, which reports to them. She said the board has sent her a list of actions it wants her to implement, though she said it was unclear whether the points were orders or just recommendations.

The letter underscored the confusion over how best to secure the Capitol after a dismal lack of protection in January and biting criticism for law enforcement’s handling of the invasion.

And it came as authorities spent the day on high alert, primed for a “possible plot” by a militia group to storm the building again, two months after Trump supporters smashed through windows and doors in an insurrection meant to halt the certification of Joe Biden’s presidential victory.

The list in the letter to lawmakers included a partial removal of the imposing fence encircling the Capitol grounds starting Monday and a drawdown of the Guard to 900 troops from the current 5,200 remaining in Washington.

Police want to keep the fence indefinitely. In her letter, Pittman said she would ask for a drawdown of the deployment “based on the threat environment and physical and operational security capabilities.”

Earlier Thursday, The Associated Press reported the Pentagon was reviewing a Capitol Police request to keep up to 2,200 Guardsmen at the Capitol another 60 days.

A statement from the police said Pittman had formally made the recommendation to the Pentagon.