Authorities are investigating after a woman was found dead in a South Jersey jail cell over the weekend.

The Cumberland County Prosecutor's Office said 24-year-old Alissa Allen, of Millville, was found alone and unresponsive at the jail at about 5:30 a.m. Sunday.

She had been arrested by Millville police on Friday and was taken to the Cumberland County Jail early Saturday morning, according to prosecutors.

Officials didn't disclose further details about Allen's arrest or the circumstances of her death.

The death remains under investigation. Prosecutors said jail officials are cooperating in the probe.