An explosion has struck a Hong Kong-flagged container ship traveling north through the Red Sea, sparking a major fire that forced its crew to abandon the vessel.

Yemen’s Iran-backed Houthi movement has released the crew of a cargo ship more than a year after its fighters hijacked the vessel in the Red Sea, as part of its campaign of attacks in support of Hamas in its war against Israel.

Shipping companies expressed caution about using the shorter route between Asia and Europe that many ships have avoided for more than a year.