Prosecutors in Oklahoma are seeking the death penalty for a man accused of beheading one former co-worker and attacking another.
Authorities said Nolen then turned to Johnson, stabbing her neck and face with the knife and uttering phrases in Arabic as he attacked.
The district attorney said Nolen had three targets in mind, one of whom was Johnson, and that they were of different sexes and races.
Johnson was released from the hospital after being treated for cuts to her neck and face, authorities said.
Police said the FBI is assisting in the investigation, looking into Nolen's background and whether he has any ties to terrorist organizations.