Law enforcement discovered a cache of ammunition and illegal guns in the New York home of a man arrested after threatening to shoot Rep. Ilhan Omar, federal prosecutors say.

Patrick W. Carlineo Jr., 55, is said to have called the office of the Minnesota congresswoman in March to threaten her life and repeat an anti-Muslim conspiracy theory.

“Do you work for the Muslim Brotherhood? Why are you working for her, she’s a [expletive] terrorist. I’ll put a bullet in her [expletive] skull,” Carlineo said in the call, according to the U.S. Attorney General’s Office.

Omar, along with fellow freshman Democratic Rep. Rashida Tlaib of Michigan, is one of the first Muslim women in history to be elected to Congress.

[FBI investigating assassination threat against Rep. Omar scrawled on gas station bathroom stall]