Protesters rallying against the grand jury decision in Ferguson, Mo., formed a human chain across Interstate 395 early Sunday afternoon, shutting down the north and southbound lanes of the highway, D.C. police said.

As of 1:40 p.m., D.C. police said traffic is flowing on the highway.

The protest — which began around 12:50 p.m. — blocked vehicles in both directions on the highway near Exit 4. Interstate 395 was still closed as of 1:25 p.m.