NEWFANE, Vt. (AP) – A tanker truck carrying 2,500 gallons of heating oil veered off a highway and rolled into a river Thursday, killing the driver, officials said.

The truck, owned by Barrows & Fisher Oil Co. of Brattleboro, was northbound on Route 30 when it hit a guardrail near the Newfane-Townshend line and plunged into the West River, coming to rest on its side, partially submerged. The driver, Eduard Lashway, 30, of Guilford, was ejected.

The cause of the accident was unknown, according to Sgt. John Flannigan, a spokesman for the Vermont State Police.

Route 30 was closed in both directions for hours afterward and a hazardous materials team used booms in a bid to contain the 100 gallons of oil that leaked into the river, which flows into the Connecticut River. Brattleboro Fire Department divers were also on the scene.

A man who answered the telephone at Barrows & Fisher had no comment on the accident.