HOUSTON: Offshore crude oil production in the US-regulated northern Gulf of Mexico was down 13%, or 242,681 barrels per day (bpd), on Thursday, four days after Tropical Storm Cristobal came ashore, the US Bureau of Safety and Environmental Enforcement (BSEE) said.

Natural gas output from the offshore Gulf of Mexico remained cut back by 9%, or 241 million cubic feet a day (cfd), after the storm, BSEE said.