WASHINGTON (AP) — The National Guard of the District of Columbia is investigating the use of one of its helicopters to make a “show of force” against protesters near the White House, while President Donald Trump is encouraging authorities to get tougher to quell the unrest over George Floyd’s death.

Two Defense Department officials said the administration had ordered military aircraft to fly above Washington on Monday night as a “show of force” against demonstrators.

Earlier Monday evening, law enforcement officers on foot and horseback moved aggressively to clear protesters away from Lafayette Park near the White House before President Donald Trump walked to a nearby church for a photo opportunity.

Attorney General William Barr ordered law enforcement to clear the park and push back the perimeter around the White House when he arrived there Monday evening, before the president’s remarks, and that led to police using force to disperse protesters, a person familiar with the matter told The Associated Press.

The Park Police and Secret Service have had dozens of officers out in riot gear in Washington for the last few nights, in addition to the Metropolitan Police Department.