WAYNE, N.J. (AP) — Five people in critical condition after a tour bus accident in New Jersey were released from the hospital and three others were upgraded to fair condition, a hospital spokeswoman said Sunday.

State police said 23 people were injured in Saturday morning's crash in Wayne, including two young children. A spokeswoman at St. Joseph's Regional Medical Center declined to provide further details Sunday about the three patients in fair condition or say when they might be released.

Authorities were still working Sunday to determine what caused the accident on an exit ramp off of eastbound Interstate 80.