Video: Officers Take "Heavy Gunfire" in Ferguson

An evening of peaceful demonstrations in Ferguson, Mo., on Monday against the killing of 18-year-old Michael Brown descended into another night of chaos with police coming "under heavy gunfire" and leading to the arrest of more than two dozen people. Watch video here .

Capt. Ron Johnson of the Missouri State Highway Patrol said early Tuesday that 31 people were arrested, four police officers were injured by thrown rocks and bottles, at least two people were shot, and two fires were set during a night of clashes between police and protesters.

Johnson said "officers came under heavy gunfire" during the night, but said officers did not fire a single shot. They "acted with restraint and calm," he said.

Amid the tense situation, a group of people trying to keep the peace locked arms and managed to position themselves between the more confrontational protesters and the police line. However, while many among the protesters clamored for calm, some in the crowd appeared determined to provoke an incident, USA Today reports.

Johnson said some of those arrested were from as far away as New York and California — part of what he called "a dangerous dynamic of the night."