It is a scam, as the IRS agent stated in his message. If you listen to the msg it has the same lack of knowledge of the english language as when they used to have a real person call.
A lady saying for me to call back immediately , saying last call before I will be arrested. For a moment I thought I was back in Cuba and almost got in a boat to scape again. This is a professional BS
SCAM!!! They called and said the police are on their way to the house and that the IRS issued a warrant for my arrest for tax fraud and I needed to get money out of the bank right away and once I did they would tell me what to do next. Said he was a middle man for the police and IRS. Gave a website www.estps.gov. He had my address. He also said not to hang up the phone because if I did he would no longer be able to help. Spoke with police department and they said it was a fraud and it is easy to get someone's address.