This post was updated Jan. 13 at 3:47 p.m.

University police arrested a woman Saturday for a robbery that occurred Thursday night.

The woman threatened a UCLA student with a box cutter, and stole the student’s cell phone. She was last seen walking south on Gayley Avenue towards Strathmore Drive.

UCPD described the woman as 28 years old, 5 feet, 3 inches, 120 pounds, with black hair and brown eyes. She was last seen wearing a black dress.

The woman was arrested Saturday, according to an update from UCPD.

UCPD advises students to report suspicious activities to the police and lock all windows, doors and gates.