CANTON, Ohio (AP) — Federal regulators have again told a company building twin natural gas pipelines across northern Ohio to stop drilling under a river because of concerns over a spill.

The Federal Energy Regulatory Commission says in the stoppage ordered Wednesday that it wants the builders of the Rover Pipeline to answer questions about the spill and look at whether there are other options to cross the river.

Ohio officials say 200,000 gallons of drilling fluid down have been lost in a drilling hole.

Dallas-based Energy Transfer Partners is developing the $4.2 billion pipeline across Ohio and into West Virginia and Michigan. It's also was behind the Dakota Access oil pipeline.

The company says it has stopped work near the river crossing in northeast Ohio, but construction is continuing along the remaining route.