A fire burns on Sunday during riots in Ferguson. (Robert Cohen/St. Louis Post-Dispatchv via AP)

Dozens of people were arrested after looting broke out in suburban St. Louis on Sunday night, following the fatal shooting of an unarmed 18-year-old by a police officer a day earlier.

Brian Schellman, a spokesman for the St. Louis County Police Department, said that 32 people were arrested following the riots.

The county police had asked for help in responding to the looting, which occurred over several hours on Sunday. Officers from the city of St. Louis as well as the Missouri Highway Patrol arrived at the scene shortly after 11 p.m. on Sunday, with the St. Louis officers leaving Ferguson shortly before 3 a.m. 

About 300 officers responded to the chaotic scene on Sunday, Schellman said. In addition, two police officers sustained minor, non-life-threatening injuries, he said.

By Monday morning, the sites where rioting occurred were covered with graffiti, broken glass and other debris.