The British security firm Ambrey says it has received a report that a Yemeni fishing vessel was hijacked in the Gulf of Aden.

“Crew on board the fishing vessel were off-boarded in Bosaso, Somalia. One crew member was shot,” Ambrey says, in an advisory note.

Early this morning, an explosive detonated near a ship in the Gulf of Aden in a suspected attack by Yemen’s Houthi rebels, potentially marking their latest assault on shipping through the crucial waterway leading to the Red Sea.