Updated

A sheriff's deputy has been booked on suspicion of having sex with an inmate at a jail in southern California, authorities announced Friday.

Jennifer McClain, 29, was arrested Thursday night after being suspected of engaging in sexual activities with a male inmate at the Men's Central Jail in Santa Ana, Calif., southeast of Los Angeles, during November and December last year, The Orange County Register reported.

Orange County sheriff's department spokesman Jim Amormino said it was not known if McClain -- a five-year employee with the department -- had known the inmate prior to him being detained at the prison.

Amormino said McClain was released Thursday on her own recognizance.

Association of Orange County Deputy Sheriffs president Tom Dominguez said in a statement that McClain was cooperating with investigators.

"The allegations made against one of our own are very serious," the statement read. "We are confident that the investigation will be thorough and we anticipate a fair and just outcome."