Ferguson, Missouri, has seen another night of heavy unrest in the ongoing uproar over the fatal police shooting of 18-year-old Michael Brown. At least 31 people were arrested as street clashes erupted between groups of demonstrators and riot police. Police are claiming they came under “heavy gunfire” and that unknown suspects shot two people over the course of the night. Highway Patrol Captain Ron Johnson blamed what he called a small group of “lawbreakers.”

Capt. Ron Johnson: “These criminal acts came from a tiny minority of lawbreakers. But anyone who has been at these protests understands that there is a dangerous dynamic in the night. It allows a small number of violent agitators to hide in the crowd and then attempt to create chaos. The catalysts can be bottles thrown, Molotov cocktails, and of course shots fired. Protesters are peaceful and respectful. Protesters don’t clash with police.”

At least two journalists were detained overnight, including Ryan Devereaux of The Intercept. The governor of Missouri deployed the National Guard to the streets of Ferguson, but so far they have played a limited role, protecting the police command post.