Waco police report a 20-year-old Waco woman has been arrested on charges she attacked her 80-year-old grandmother with a steak knife.

Police were called to the 900 block of Joy Drive Thursday night at 8:15. They arrived to find that the victim and suspect had been arguing when the suspect grabbed the knife and slashed at the older woman. the victim was transported to a local hospital for treatment of her injuries.  The suspect,  identified as 20-year-old Elizabeth Oneal was found nearby, arrested and taken to the McLennan County Jail on charges of aggravated assault.