Royal Dutch Shell confirmed two fatalities as a result of an incident at its Auger tension-leg platform in the deepwater U.S. Gulf of Mexico on June 30.

“One other non-life-threatening injury was sustained, and that individual is being treated at a nearby hospital,” Shell said in an emailed response July 1.

The accident occurred around 9:00 a.m. CST during a routine and mandatory test of a lifeboat launch and retrieval capabilities at the platform, located 214 miles south of New Orleans.

According to the company website, Auger began producing energy in September 2014 from the Cardamom oil and gas field, which could produce up to 50,000 barrels of oil equivalent each day.