SOUTH PORTLAND – A Massachusetts man was arrested for operating under the influence after he rolled his car early Saturday morning on Veterans Memorial Bridge.

Daniel Thomas, 22, of Shrewsbury, Mass., was arrested by South Portland police after the rollover was reported.

When police arrived, Thomas, the driver and only occupant, was outside of the upside down 2002 Dodge van, according to Lt. Frank Clark.

The crash remains under investigation, but police say speed and alcohol were likely contributing factors.