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.

A fire broke out aboard the Morning Midas, a 600-foot Liberian-flagged cargo ship traveling from China to Mexico with more than 3,000 vehicles onboard—751 of them either fully electric or hybrid models.

An auto transport ship carrying hundreds of EVs and in total a few thousand cars was abandoned in the Pacific Ocean. The United States Coast Guard says in a press release it responded on the afternoon of June 4 to the situation,