A peaceful protest in Portland, Oregon, on Saturday broke into chaos as federal agents deployed tear gas on demonstrators—including families with young children.

Thousands of protesters marched through the city and gathered in the blocks surrounding the Immigration and Customs Enforcement building. According to the Oregonian, just minutes after the crowd arrived at the facility, federal agents launched tear gas, pepper balls, rubber bullets, and flash-bang grenades after some demonstrators approached the security gate.

Labor leaders from over 20 unions led the march to the ICE building, with many protesters participating as part of the “Labor Against ICE” rally.