A rioter over the weekend threw a rock through the window of an office used by U.S. Immigration and Customs Enforcement in Washington, where a fire was also set, authorities said Tuesday. 

A broken window at an ICE office in Washington state where a rioter attacked the building, the Department of Homeland Security said.  (DHS)

Local authorities in Yakima, Washington are investigating the attack as an arson, the Department of Homeland Security said.