Anthony J. Kazmierczak frequently posted online about conservative issues. He told a neighbor that he was going to get arrested at an event hosted by Ms. Omar.

A man sprayed an unknown substance on Democratic U.S. Rep. Ilhan Omar and was tackled to the ground Tuesday during a town hall 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.

Rep. Ilhan Omar, D-Minn., held a town hall Tuesday evening in her home district amid recent shootings involving federal immigration agents and local agitators in Minneapolis.

Anthony Kazmierczak, 55, is in Hennepin County Jail for allegedly assaulting Omar. He hasn't been formally charged, but was booked for probable cause of third-degree assault.

MINNEAPOLIS — The FBI has taken the lead in the criminal investigation into Rep. Ilhan Omar being sprayed with a liquid as she spoke Tuesday at a town hall meeting in Minneapolis, a police spokesman said.

U.S. Customs and Border protection said the two agents who fired on Alex Pretti in Minneapolis have been on leave since Saturday.

Brother labels suspect who attacked Ilhan Omar a ‘right-wing extremist’ who has hated Somalis for decades - Exclusive: ‘In my mind, he’s a piece of s**t,’ Anthony Kazmierczak’s brother told The Indepe