A suspected missile attack by Yemen’s Houthi rebels targeted a container ship in the Red Sea on Monday, authorities said, the latest assault in their campaign against international shipping in the crucial maritime route.

The attack happened off the coast of Mokha, Yemen, the British military’s United Kingdom Maritime Trade Operations center said, without offering any other immediate details.

It urged vessels to exercise caution in the area.

The private security firm Ambrey said a salvo of three missiles targeted a Malta-flagged container ship traveling from Djibouti onward to Jeddah, Saudi Arabia.

“The vessel was targeted due to its listed operator’s ongoing trade with Israel,” Ambrey said.