Portland, OR -

A 33-year-old woman accused of attacking two elderly woman in Portland and taking their purses pleaded not guilty Wednesday to assault and robbery charges.

Tiffany Denise Smith is being held without bail and is due in court again on Jan. 24 at the Justice Center in Portland.

The Oregonian reports she's accused of robbing purses from an 89-year-old woman and a 90-year-old woman. The 89-year-old was knocked down and badly bruised during a struggle.

Smith was arrested Tuesday on an unrelated Clackamas County warrant charging her with prostitution.