A Wichita Falls woman is in jail today after police say she pulled a knife out of her underwear and assaulted another woman. Officers arrested 54-year-old Erma  Olivas around 7:00 Thursday evening.

They say the victim was taking out her trash on Holliday Rd. near 32nd street when Olivas approached her and began yelling threats.

Police say Olivas then lifted up her dress, pulled out a 5-inch kitchen knife from her underwear and used her free hand to punch the woman. Officers found Olivas about 3 blocks away and said she made threats to them and their families.

She is charged with aggravated assault, unlawful carrying of a weapon and threat of obstruction or retaliation.