Rep. Adam Schiff sent a letter to Department of Homeland Security officials announcing an investigation into the actions the agency took to respond to widespread protests in Portland, Oregon, over the last few weeks.

The California Democrat, who chairs the House Intelligence Committee, addressed concerns over how the department collected intelligence and extensively monitored journalists and nonviolent protesters. The letter was addressed to DHS acting Secretary Chad Wolf and Horace Jen, Office of Intelligence and Analysis acting undersecretary.