Salvage workers are stepping up work remove oil residue from the hull of a bulk carrier which grounded off Gibraltar one month ago.

There have been continued problems with oil sheening around the wreck of the 35,362-dwt OS 35 (built 1999), and shore pollution, despite the removal of fuel oil and other contaminants from the vessel.

A Recovery Coordination Centre reported that dive surveys have now successfully located several pockets of oil trapped in the hull which have been seeping to the surface.