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

The ship was drifting and ablaze some 225 kilometers (140 miles) off the coast of Hodeida, a port city in Yemen held by the country’s Houthis, said the Diaplous Group, a maritime firm.

It wasn’t immediately clear what caused the fire in the Red Sea, which has been repeatedly targeted by attacks from the Houthis.

The Houthis said last week they were was limiting their assaults following a ceasefire in the Israel-Hamas war in the Gaza Strip . The Houthis did not immediately acknowledge the fire incident.

The vessel was abandoned and the crew later rescued unharmed, another maritime industry official told The Associated Press.

The official spoke on condition of anonymity as authorization hadn’t been given to speak publicly about the incident.

The official described the cargo aboard the vessel as “dangerous,” without immediately elaborating. The name of the vessel wasn’t released.

The Red Sea is home to coral and marine life that previously has been threatened by burning ships from the Houthi campaign and the threat of wider oil spills.

The Houthi attacks, which began in November 2023, have halved the number of ships passing through the Red Sea corridor, a crucial route for energy shipments and cargo moving between Asia and Europe. Despite the pledge by the Houthis to limit their attacks, shippers broadly are still shying away from the route over the risks.

Some $1 trillion worth of trade passed through the region each year before the attacks.