Official IRS Government site detailing this scam and providing links to report it:
http://www.irs.gov/uac/Newsroom/IRS-Warns-of-Pervasive-Telephone-Scam
These scam artists call from a variety if different telephone numbers with the same IRS tax fraud story. I actually enjoy speaking with them and listening to the routine. After a while, when they're convinced they have a potential pidgeon, I nervously ask if I can ask them a question. When they say yes, I launch into a tirade of obscenities and requests for sexual favors. On one occasion I heard the person gasp before hanging up. Needless to say, they don't call me anymore.
Same scam. They won't stop trying. It time to get out a can of whoop [***]. I wonder if our government even care. This type of screaming should be something of the past with the technology that is available..
Second call today, last one at 9:15 PM, this time I had it blocked. Same message as D briggs suggests, and the accent is so thick it takes a bit to even understand what's being said. Truly concerned for those who don't know this is a scam.