Calls asking for a fee to claim grants

Been called twice in four days.  1st name, Christine Thompson, $9,800 grant has been picked for me because I pay my bills, taxes, etc on time.  No criminal records and no bankruptcies in the last 2years.  Today his name, Martin Luther, $7,000 grant has been picked for me.  Christine Thompson, investigator, Grant I'd # MA212, must call 202-656-4395, got a full mailbox.   Martin Luther, $7,000, I'D#USG 143, call 315-888-3017.  Both asked me to call from the Wal-Mart parking lot and call the numbers and they would make sure I would have the cash, in my hands TODAY!  Neither caller spoke good English, look at the names of these people.  Christine asked for$120 to get the grant and my actual check would be $9120, no cost to me in that scenario.  Martin wanted $250, which also would be refunded in the check, making it $7,250.  Conditions were the money could not be used for illegal drugs, alcohol, or any other activities of illegal status.  The accents were definitely middle eastern and barely understandable.  Really folks, this carp needs to stop.  Taking advantage of people in real need of money to survive and older folk, limited incomes, disabled, etc is the highest form of stealing money that's probably used to fund terrorism.  Please make sure loved ones and friends don't fall into this scam.