They called 3 times today. On my caller ID it says unassigned and the number. I pick up and they say it's the IRS and that they have a lawsuit against me and that they have a arrest warrant out for me and I need to call them back. But they don't say who the lawsuit and arrest warrant is for. I'm tired of this because it's a scam. I block them from my phone but they keep on trying to call. So I'm reporting them. Plus I'm on the do not call list and have a unlisted phone number.