LINCOLN, Neb. (AP) — A state prisons food service worker has been arrested on suspicion of unauthorized communication with a prisoner, Nebraska officials said.

Nicole Schwab, a food service specialist at the Lincoln Correctional Center, was arrested Wednesday, the Nebraska Department of Correctional Services said in a news release. The release said the 38-year-old Schwab resigned upon her arrest for the felony charge.

Schwab had been employed at the prison since June 1, the release said.

The arrest is the latest in a string of similar arrests since last year that led Nebraska Department of Correctional Services Director Scott Frakes to express frustration over the development in February.

Frakes said then that all state prisons employees are warned upon being hired about the “need to maintain professional boundaries.”