MINNEAPOLIS (AP) — A man sprayed an unknown substance on U.S. Rep. Ilhan Omar before being tackled to the ground Tuesday during a town hall she was hosting in Minneapolis, where tensions over federal immigration enforcement have come to a head after agents fatally shot an intensive care nurse and a mother of three this month.

The audience cheered as the man, who was wearing a black jacket, was pinned down and his arms were tied behind his back. In video of the incident, someone in the crowd can be heard saying, “Oh my god, he sprayed something on her.” Omar continued the town hall after the man was ushered out of the room.

Just before that Omar called for the abolishment of U.S. Immigration and Customs Enforcement and for Homeland Security Secretary Kristi Noem to resign. “ICE cannot be reformed,” she said.

Minneapolis police did not immediately respond to a phone call and email message seeking information on the incident and whether anyone was arrested.

The White House did not immediately respond to a message seeking comment Tuesday night.