Scammer!!!

This number has called twice yesterday and once today. ID shows Fresno CA.
Leaves no message and I don't answer.

I am calling about .. blah blah.. Treasury Department infraction... Federal Marshals coming for you....  grand jury... help us to help you. Soon we will call your beloved elders, especially those old veterans of yours and terrorize them into sending us all their savings before you can do anything. Thank you for not taking control of your government and institutions so that we may continue these calls.

Just got a call from and they left a voicemail.  It is those freaking idiots trying to say they are the Treasury Dept. and you need to call them immediately or they are coming to prosecute you.  Well, come and get me.  You SOB's.  Ever since my facebook account got hacked, I have been flooded with BS!!! At least I have my Iphone and can block them.

Would really like to know how to stop the calls.  This is crazy.  Really would like to know how to report them.