This was a (younger) man that had Indian accent. Here is a synopsis of this phone call: "Hello, this is "Inaudible name". I'm calling from the Investigations Dept. of the Internal Revenue Services. There has been a legal case filed against you. Please call me back using my department's call-back number at (347) 430-4601, before anything goes wrong".
He called repeatedly four to five times in a short period of time and finally left a message. I did not answer the phone since I'm rarely answer un-known phone calls until they leave a voice mail.