A spill at a Shell facility leaked nearly 100,000 gallons of oil into the Gulf of Mexico on Thursday, but officials say they have contained the spill and cleanup operations are underway.

The leak discharged from a Shell subsea well-head flow line near the Brutus platform, according to WWL-TV. It left a 13-by-2-mile oil sheen in the area, federal officials told NBC News.

The spill was about 90 miles south of Timbalier Island, according to the New Orleans Times-Picayune. In total, about 88,000 gallons of oil leaked into the Gulf, the report added.

In a statement, Shell said no drilling occurs at the Brutus platform, nor is this a well control incident. The leak was isolated and production was shut down when officials became aware of the spill, Shell also said.

The platform is 15 years old and has a capacity of 100,000 barrels, Reuters reported. For comparison, Thursday's oil spill was about 2,100 barrels, and the 2010 Deepwater Horizon oil spill sent more than 3 million barrels of oil into the Gulf.

The cause of the leak remains under investigation, and Shell executives flew over the spill Thursday to observe the sheen. Nobody was injured and no evacuations were necessary during the leak, Bureau of Safety and Environmental Enforcement officials said.

"No release is acceptable, and safety remains our priority as we respond to this incident," Shell spokesperson Kimberly Windon said.

Source: https://weather.com/science/environment/news/shell-oil-spill-brutus-platform-gulf-of-mexico