Nigeria, June 9 -- Hundreds of protesters demanding implementation of a disputed ward delineation report have shut down 13 oil flow stations in Delta State, disrupting operations at major oil facilities and threatening as much as 400,000 barrels of Nigeria's daily crude production, according to industry sources.

The shutdown, which began on Monday across communities in the Warri Federal Constituency, has raised concerns over the potential impact on Nigeria's oil production targets, export commitments and government revenues if the standoff persists.

The affected facilities are operated by Renaissance Africa Energy Company, Chevron Nigeria Limited and Nestoil/Neconde.

Industry sources told PREMIUM TIMES that the 13 facilities collective...