A team of divers appeared to find the source of an oil spill in the Gulf of Mexico on Sunday after a miles-long oil slick appeared in the wake of the mammoth Hurricane Ida.

Divers found oil leaking from a foot-wide pipeline along the ocean floor after Talos Energy, a Houston-based energy company, paid for a private team to investigate the leak. The pipeline does not belong to Talos Energy, the company said, adding that it is working with the U.S. Coast Guard to investigate the incident.

Talos said two smaller pipelines were found in the area that were open and seemingly abandoned, although its unclear if oil had leaked from them.

The Associated Press first reported last week that aerial photos showed a wide oil slick on the surface of the water about 2 miles off the coast of Louisiana. The slick appeared to stretch at least 12 miles and clean-up crews rushed to the area to try and figure out where the oil was coming from.