A woman is under arrest after Bexar County deputies discovered illegal gambling at a West Side home on Thursday afternoon. Deputies found 21 gaming machines inside a hidden room in the home on Loy Drive, near Woodlawn Avenue and Northwest 36th. They also found five grams of meth, a thousand-dollars cash, and a stolen gun. They arrested a 40-year-old woman who was reportedly running the operation. There was already a warrant out for her arrest on a drug charge. The owner of the house wasn't there.