Many calls from varying phone numbers. Unprofessional and threatening. I hope they are caught and prosecuted and made an example so that others will not try and scam people as well.
Fraudulent con artists pretending to be from the DEA, FBI or other government agencies. This is CRIMINAL FRAUD. Just hang up and block the number, then call and report to your local police or the FBI. Don't become a victim of this criminals!
Call and hang up krap kall. Caller ID V10912125300150 - they have many variations on the theme. Easy to spot, just don't answer. No point in even bothering to block... they have a nearly infinite number of bogus numbers they call from.