I got the same message on my cell phone. Terrible accent, difficult to understand. Robot call I think that says "federal investigation ....... your address"
Received two calls in an hour- same person with an Indian or Pakistani accent. He said a warrant had been issued by the IRS for my arrest. Previous calls over several months were from a woman who said I was being investigated. Channel 2 here in L.A. did a piece about this scam last night- very common and the perpetrators are arrogant. Will submit to IRS as a scam.