Smoke rises from a blaze on a container ship docked at the Port of Los Angeles on Nov. 21 in Los Angeles.ABC7 via AP

Authorities lifted an overnight shelter-in-place Saturday after a fire aboard a container ship at the Port of Los Angeles raised hazardous-materials concerns and drew more than 100 firefighters to the scene.

All 23 crew members of the One Henry Hudson were accounted for and uninjured after an electrical fire erupted below deck Friday, according to the Los Angeles Fire Department. Officials said they had identified hazardous materials aboard the vessel. It is still not clear how the fire started.

Just before 3 a.m., Mayor Karen Bass announced a shelter-in-place order for the areas around the port, including San Pedro and Wilmington.

"Remain at home, keep windows closed and turn off HVAC systems," she said on X.

The U.S. Coast Guard said a safety zone of one nautical mile had been established around the vessel.

The fire spread to several levels of the ship, leading to an explosion mid-deck, according to the fire department.

The Port of Los Angeles is known as the busiest seaport in North America.

The 1,102-foot-long vessel is operated by One Ocean Express, a shipping company headquartered in Singapore. Before Los Angeles, the ship had most recently been in Japan, stopping in Kobe, Nagoya and Tokyo.

One Ocean Express did not immediately respond to an email from The Associated Press requesting comment.