The crooks probably spoofed the number on Caller ID.  The recorded message said IRS is filing a lawsuit and to call the office at 612-475-2490.
If you get one of these calls, please report it promptly to the FCC at this web site:
https://consumercomplaints.fcc.gov/hc/en-us?r ... n-us%2Frequests
Maybe they'll catch the scammers before they change numbers.