Two grannies in northeastern Pennsylvania - who were apparently not satisfied with living off monthly Social Security checks - were busted by local police for allegedly running a cash-cow heroin operation that raked in $10,000 per week.

Siblings Elizabeth Grube, 70, and Elaine Volkert, 65, of Stroud Township were freed on their own recognizance after being arrested and charged with possession of heroin with intent to deliver. Julio Checo, 28, of Allentown, was also arrested on charges of allegedly supplying large quantities of heroin to the sisters, but he is still in jail unless he posts a $75,000 bail.

Authorities reportedly say that police think the senior citizens were selling about $10,000 worth of heroin from their homes for approximately six months.

Police reportedly found 400 bags of heroin, with a street value of $8000, as well as $200 in cash from Grube's trailer home, and on the same block at Volkert's home, investigators seized $20,000 worth of heroin, plus more cash, along with Oxycontin and marijuana.

Apparently the sisters just have an entrepreneurial bent, because the police reportedly say they used to sell crack cocaine.