Occidental Petroleum Corp, W&T Offshore Inc and Talos Energy are among oil drillers that shut offshore production following an oil spill that’s shaping up to be the largest in the US since the Deepwater Horizon disaster.

Producers halted about 62,000 barrels of daily oil output Thursday after a subsea pipeline ruptured and leaked 26,000 barrels of oil — equivalent to two Olympic-size swimming pools — into the Gulf of Mexico near Louisiana. If the size of the leak is confirmed, it would be the largest spill since 2010, when BP PLC’s Deepwater Horizon rig blew up, dumping 3.2 million barrels of oil off the coast of the Pelican State.