Environmentalist protesters shut down part of the George Washington Memorial Parkway in Northern Virginia during Wednesday morning’s commute.

Declare Emergency arrived on the northbound lanes of the G.W. Parkway near Spout Run Parkway at around 8:15 a.m.

At around 8:43 a.m., the group posted a photo of the protesters, along with police responders, on Twitter. The caption explained that the group “disrupts the status quo for a livable future.”

The group also posted a video of activists walking into the road.

The northbound lanes of the traffic artery, which hugs the Potomac River between the Pentagon and the Capital Beltway, was shut down between Spout Run Parkway and Chain Bridge Road for about an hour.

By 9:21 a.m., the protest blockage had been cleared by the U.S. Park Police.

Law enforcement arrested three protesters and has charged them with disorderly conduct, but did not immediately release any identifying details about the suspects.