A tanker truck rolled over in the area of 360 Buxton Road around 3:20 a.m. Wednesday, spilling part of its load of water into a culvert. The driver, 33-year-old Iman Mohammed of South Portland, was taken to Southern Maine Health Care in Biddeford with non-life threatening internal injuries. He was later transferred to Maine Medical Center in Portland.

Saco police are investigating the accident with the assistance of the Maine State Commercial Unit. Speed is being considered as a primary cause of the accident, according to police.