The U.S. Capitol was on high alert Thursday amid concerns over a militia group's possible plot to breach the building, but no incidents have yet been reported.

Police said they obtained intelligence about a possible plan on Thursday to breach the Capitol, the scene of election-related violence about two months earlier.

The plot was linked to a right-wing conspiracy theory promoted and circulated by QAnon adherents that former President Donald Trump will return to power on the same day.

The date, March 4, was the original inauguration day for presidents before 1933.

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There were no signs of any disturbances Thursday, according to The Associated Press. However, Capitol Police said they asked the Department of Defense to extend the support provided by the National Guard beyond the planned end of its mission on March 12.

The request to keep as many as 2,200 National Guard troops in Washington for another two months underscores the continuing concerns about security and the potential for violence at the Capitol, according to AP.

The Capitol was stormed on Jan. 6 by a pro-Trump mob, which included right-wing extremists, as Congress was engaged in a process to formally certify President Joe Biden's election win.

Five people died in the attack, including a police officer and a Trump supporter who was shot by police.