A Washougal, WA, woman faces an assault allegation after she reportedly slashed a Vancouver police officer in the face with a steak knife Monday night.

Police were dispatched to a reported assault at the Royal Plains Apartment. A witness flagged down arriving officers and pointed in the direction of Mariah C. Dickison, 26, who had a large metal object in her hand, according to a probable cause affidavit filed in Superior Court.

Dickison had reportedly pulled a metal sign out of the ground. When officers arrived, she turned and ran, still holding the sign, Vancouver police spokeswoman Kim Kapp told the Columbian.

The officers chased Dickison and then deployed a Taser to try to stop her, but it had no effect, the affidavit states.

Dickison kept running until she tripped and fell. The officers tried to gain control of her arms, but she was swinging them wildly, and hit Officer Matthew Hoover in the face. He later realized that he had been stabbed on the left side of his face, court records said.