Emmy Rossum has found herself the target of a series of anti-Semitic tweets following her comments last week after Donald Trump won the U.S. presidential election.

The Shameless actress came forward Sunday and revealed she had received a flood of World War II-related messages from social media users, attacking her Jewish heritage.

“Trump supporters are sending me messages threatening to send me & my ‘ilk’ to the gas chambers & writing hashtags like ‘#sieg hiel’. NOT OK,” she tweeted. “Telling anyone to ‘get ready for the trains’ in reference to WWII is disgusting & offensive. Reporting you to twitter is not enough. Back off.”

Rossum took a screenshot of one message, which was later deleted, that featured imagery evocative of concentration camps used by the Nazis in the Holocaust.

“No matter WHO you voted for, I don’t care, THIS is not okay. ‘You will be seeing a train shortly,'” she wrote. “This doesn’t scare me. It doesn’t cause me nightmares. I find it sad to recognize that this kind of vicious underbelly was there all along.”

After the election last week, Rossum explained why Trump’s rhetoric affected her so strongly. “It’s hard to understand how so many people saw something so differently than you did. It feels personal to so many,” she tweeted. “I am a woman. I am Jewish. I am marrying an Arab American. My sister in law is handicapped. I’m a victim of sexual violence. It’s personal. We are in this together.”