(CNN) Bill Cosby entered the general population last month at the Pennsylvania prison where he's serving at least three years and is being "treated just the same as any other inmate," a state corrections spokeswoman said.

Cosby, 81, was moved January 28 and is now in a single cell without a cell mate, which is typical for the facility, said Amy Worden, press secretary for the Pennsylvania Department of Corrections.

Cosby's unit houses inmates of varying ages and it is not a geriatric unit. Worden would not say specifically where in the prison he is being held.

Cosby previously was held in a single cell in a unit adjacent to the infirmary. While there, he could not move as freely around the prison as other inmates.

The comedian once known as "America's Dad" was found guilty last year of aggravated indecent assault for drugging and sexually assaulting Andrea Constand in 2004 at his home near Philadelphia. Cosby was sentenced in September to 3 to 10 years behind bars. At the State Correctional Institute at Phoenix, he is listed as Inmate No. NN7687.

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