A desperate search for a missing Louisiana worker has continued into Monday after an explosion occurred on a large oil rig Sunday night, authorities confirmed to ABC News.

The Kenner Police Department said it fielded a flurry of 911 calls at 7:18 p.m. Sunday after witnesses heard a loud explosion and reported seeing a large fireball and cloud around Lake Pontchartrain, which is just north of New Orleans.

Lt. Brian McGregor told ABC News that after their phones line lit up, boats were launched by Kenner Police Department and Louisiana Wildlife and Fisheries “within seconds.” The crews assisted seven injured workers and transported another four stranded workers aboard the rig to shore, but one victim remains unaccounted for.

“We wanted to get to those people,” McGregor told ABC News. “I was there when the boat came in with seven people.”

Jefferson Parish, La., authorities and others from other parishes respond to an oil rig explosion in Lake Pontchartrain off Kenner, La., Oct. 15, 2017.

The majority of victims suffered burn injuries, McGregor said.

Five workers in critical condition were rushed to University Medical Center, a level 1 trauma center, and two others were taken to East Jefferson General Hospital. Michael Guillot, director of East Jefferson Emergency Medical Services, said the victims suffered “blast-type injuries and burns.”

Two workers, according to McGregor, who were more stable at the time were transported to Baton Rouge, Louisiana, to receive treatment for fire-related injuries.

Clovelly Oil Company, the owner of the oil rig, released a statement about the fire and its oil and gas production on…