A cargo ship transporting 3,000 cars was abandoned in the middle of the Pacific Ocean on Tuesday after a massive fire broke out. As of Friday, the ship was still burning. The blaze may have been fueled by the vehicles’ lithium-ion batteries, which are notoriously difficult to extinguish once ignited.

The ship, operated by UK-based Zodiac Maritime, was abandoned off the coast of Alaska after sailors were unable to contain the blaze. According to The Register, the ship was loaded with around 3,000 vehicles,

A cargo ship named Morning Midas, carrying about 3,000 vehicles, including approximately 800 electric models, was abandoned in the Pacific Ocean after a fire.