Tulsa Police search for four suspects who robbed two people at gunpoint overnight.  It happened shortly after midnight near 17th and Olympia.  Tulsa Police say a brother and his sister were in the front yard of a home when the four suspects approached them.  Two of the suspects had guns. 

Police say one suspect hit the woman when she refused to give up her purse.  She is going to be okay. 

The suspects got away with cash.