State subpoenas Prudhoe owners over oil spills

State officials have hit BP — as well as four other oil companies — with subpoenas ordering them to produce documents related to two spills and pipeline maintenance in the troubled Prudhoe Bay field.

BP, which runs the field, previously had received subpoenas from the state as well as a federal grand jury investigating possible civil or criminal violations related to an estimated 201,000-gallon oil spill in early March. It was the largest North Slope oil spill since production began there in 1977.

Investigators now are casting a wider net in the wake of BP