Incensed by a Supreme Court ruling that further dashed President Donald Trump’s hopes of invalidating his November electoral defeat, thousands of his supporters marched in Washington and several state capitals Saturday to protest what they contended, against all evidence, was a stolen election.

In some places, angry confrontations between protesters and counterprotesters escalated into violence. There were a number of scuffles in the national capital, where four people were stabbed, and the police declared a riot in Olympia, Wash., where one person was shot.

In videos of a clash in Olympia that were posted on social media, a single gunshot can be heard as black-clad counterprotesters move toward members of the pro-Trump group, including one person waving a large Trump flag. After the gunshot, one of the counterprotesters is seen falling to the ground, and others call for help. In one video, a man with a gun can be seen running from the scene and donning a red hat.